194383440 has 120 divisors (see below), whose sum is σ = 691248168. Its totient is φ = 48783360.

The previous prime is 194383429. The next prime is 194383447. The reversal of 194383440 is 44383491.

It can be written as a sum of positive squares in 4 ways, for example, as 87385104 + 106998336 = 9348^2 + 10344^2 .

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 194383395 and 194383404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194383447) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4300 + ... + 20180.

Almost surely, 2^194383440 is an apocalyptic number.

194383440 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 194383440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (345624084).

194383440 is an abundant number, since it is smaller than the sum of its proper divisors (496864728).

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

194383440 is a wasteful number, since it uses less digits than its factorization.

194383440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15917 (or 15908 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 194383440 is about 13942.1461762528. The cubic root of 194383440 is about 579.2771812179.

The spelling of 194383440 in words is "one hundred ninety-four million, three hundred eighty-three thousand, four hundred forty".