394946976620 has 72 divisors (see below), whose sum is σ = 1015577987760. Its totient is φ = 128283523200.

The previous prime is 394946976517. The next prime is 394946976679. The reversal of 394946976620 is 26679649493.

It is a super-2 number, since 2×394946976620² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10586831 + ... + 10624070.

It is an arithmetic number, because the mean of its divisors is an integer number (14105249830).

Almost surely, 2^394946976620 is an apocalyptic number.

It is an amenable number.

394946976620 is an abundant number, since it is smaller than the sum of its proper divisors (620631011140).

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

394946976620 is a wasteful number, since it uses less digits than its factorization.

394946976620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21210943 (or 21210934 counting only the distinct ones).

The product of its (nonzero) digits is 105815808, while the sum is 65.

The spelling of 394946976620 in words is "three hundred ninety-four billion, nine hundred forty-six million, nine hundred seventy-six thousand, six hundred twenty".