396393888 has 48 divisors (see below), whose sum is σ = 1135130976. Its totient is φ = 120119040.

The previous prime is 396393887. The next prime is 396393901. The reversal of 396393888 is 888393693.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×396393888² = 314256228887513088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (396393883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 186631 + ... + 188742.

It is an arithmetic number, because the mean of its divisors is an integer number (23648562).

Almost surely, 2^396393888 is an apocalyptic number.

It is an amenable number.

396393888 is an abundant number, since it is smaller than the sum of its proper divisors (738737088).

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

396393888 is a wasteful number, since it uses less digits than its factorization.

396393888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375397 (or 375389 counting only the distinct ones).

The product of its digits is 6718464, while the sum is 57.

The square root of 396393888 is about 19909.6430907237. The cubic root of 396393888 is about 734.5854407091.

The spelling of 396393888 in words is "three hundred ninety-six million, three hundred ninety-three thousand, eight hundred eighty-eight".