396728955 has 64 divisors (see below), whose sum is σ = 841144320. Its totient is φ = 173467008.

The previous prime is 396728951. The next prime is 396728971. The reversal of 396728955 is 559827693.

It is not a de Polignac number, because 396728955 - 2² = 396728951 is a prime.

It is not an unprimeable number, because it can be changed into a prime (396728951) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12609 + ... + 30861.

It is an arithmetic number, because the mean of its divisors is an integer number (13142880).

Almost surely, 2^396728955 is an apocalyptic number.

396728955 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

396728955 is an abundant number, since it is smaller than the sum of its proper divisors (444415365).

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

396728955 is a wasteful number, since it uses less digits than its factorization.

396728955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18297 (or 18291 counting only the distinct ones).

The product of its digits is 4082400, while the sum is 54.

The square root of 396728955 is about 19918.0560045402. The cubic root of 396728955 is about 734.7923611723.

The spelling of 396728955 in words is "three hundred ninety-six million, seven hundred twenty-eight thousand, nine hundred fifty-five".