394658020 has 24 divisors (see below), whose sum is σ = 829302264. Its totient is φ = 157764096.

The previous prime is 394658003. The next prime is 394658023. The reversal of 394658020 is 20856493.

It can be written as a sum of positive squares in 4 ways, for example, as 64 + 394657956 = 8^2 + 19866^2 .

It is not an unprimeable number, because it can be changed into a prime (394658023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32284 + ... + 42796.

It is an arithmetic number, because the mean of its divisors is an integer number (34554261).

Almost surely, 2^394658020 is an apocalyptic number.

It is an amenable number.

394658020 is an abundant number, since it is smaller than the sum of its proper divisors (434644244).

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

394658020 is a wasteful number, since it uses less digits than its factorization.

394658020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12399 (or 12397 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 394658020 is about 19866.0016107922. The cubic root of 394658020 is about 733.5115852270.

The spelling of 394658020 in words is "three hundred ninety-four million, six hundred fifty-eight thousand, twenty".