194775720 has 64 divisors (see below), whose sum is σ = 592583040. Its totient is φ = 51206400.

The previous prime is 194775719. The next prime is 194775731. The reversal of 194775720 is 27577491.

It is a super-2 number, since 2×194775720² = 75875162203036800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2911 + ... + 19950.

It is an arithmetic number, because the mean of its divisors is an integer number (9259110).

Almost surely, 2^194775720 is an apocalyptic number.

194775720 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 194775720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (296291520).

194775720 is an abundant number, since it is smaller than the sum of its proper divisors (397807320).

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

194775720 is a wasteful number, since it uses less digits than its factorization.

194775720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22946 (or 22942 counting only the distinct ones).

The product of its (nonzero) digits is 123480, while the sum is 42.

The square root of 194775720 is about 13956.2072211615. The cubic root of 194775720 is about 579.6665939550. Note that the first 3 decimals are identical.

The spelling of 194775720 in words is "one hundred ninety-four million, seven hundred seventy-five thousand, seven hundred twenty".