396340880 has 40 divisors (see below), whose sum is σ = 992379192. Its totient is φ = 146340864.

The previous prime is 396340843. The next prime is 396340909. The reversal of 396340880 is 88043693.

It can be written as a sum of positive squares in 4 ways, for example, as 3984016 + 392356864 = 1996^2 + 19808^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 189509 + ... + 191588.

Almost surely, 2^396340880 is an apocalyptic number.

It is an amenable number.

396340880 is an abundant number, since it is smaller than the sum of its proper divisors (596038312).

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

396340880 is a wasteful number, since it uses less digits than its factorization.

396340880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381123 (or 381117 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 41.

The square root of 396340880 is about 19908.3118319962. The cubic root of 396340880 is about 734.5526949630.

The spelling of 396340880 in words is "three hundred ninety-six million, three hundred forty thousand, eight hundred eighty".