396635808 has 24 divisors (see below), whose sum is σ = 1041169248. Its totient is φ = 132211904.

The previous prime is 396635783. The next prime is 396635809. The reversal of 396635808 is 808536693.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-3 number, since 3×396635808³ (a number of 27 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (396635809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2065716 + ... + 2065907.

It is an arithmetic number, because the mean of its divisors is an integer number (43382052).

Almost surely, 2^396635808 is an apocalyptic number.

It is an amenable number.

396635808 is an abundant number, since it is smaller than the sum of its proper divisors (644533440).

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

396635808 is a wasteful number, since it uses less digits than its factorization.

396635808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4131636 (or 4131628 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 48.

The square root of 396635808 is about 19915.7176119767. The cubic root of 396635808 is about 734.7348499836.

The spelling of 396635808 in words is "three hundred ninety-six million, six hundred thirty-five thousand, eight hundred eight".