194780940 has 48 divisors (see below), whose sum is σ = 549024000. Its totient is φ = 51595200.

The previous prime is 194780939. The next prime is 194780941. The reversal of 194780940 is 49087491.

194780940 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (194780939) and next prime (194780941).

It is a super-2 number, since 2×194780940² = 75879229174567200, which contains 22 as substring.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 194780892 and 194780901.

It is not an unprimeable number, because it can be changed into a prime (194780941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1690 + ... + 19809.

It is an arithmetic number, because the mean of its divisors is an integer number (11438000).

Almost surely, 2^194780940 is an apocalyptic number.

194780940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 194780940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (274512000).

194780940 is an abundant number, since it is smaller than the sum of its proper divisors (354243060).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

194780940 is a wasteful number, since it uses less digits than its factorization.

194780940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21662 (or 21660 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 194780940 is about 13956.3942334688. The cubic root of 194780940 is about 579.6717722743.

The spelling of 194780940 in words is "one hundred ninety-four million, seven hundred eighty thousand, nine hundred forty".