394172328 has 64 divisors (see below), whose sum is σ = 1131609600. Its totient is φ = 113158080.

The previous prime is 394172299. The next prime is 394172329. The reversal of 394172328 is 823271493.

It is not an unprimeable number, because it can be changed into a prime (394172329) 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, 34276 + ... + 44307.

It is an arithmetic number, because the mean of its divisors is an integer number (17681400).

Almost surely, 2^394172328 is an apocalyptic number.

394172328 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is an amenable number.

394172328 is an abundant number, since it is smaller than the sum of its proper divisors (737437272).

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

394172328 is a wasteful number, since it uses less digits than its factorization.

394172328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78622 (or 78618 counting only the distinct ones).

The product of its digits is 72576, while the sum is 39.

The square root of 394172328 is about 19853.7736463374. The cubic root of 394172328 is about 733.2105592444.

The spelling of 394172328 in words is "three hundred ninety-four million, one hundred seventy-two thousand, three hundred twenty-eight".