394157020 has 24 divisors (see below), whose sum is σ = 828306864. Its totient is φ = 157552896.

The previous prime is 394157017. The next prime is 394157063. The reversal of 394157020 is 20751493.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26484 + ... + 38596.

It is an arithmetic number, because the mean of its divisors is an integer number (34512786).

Almost surely, 2^394157020 is an apocalyptic number.

It is an amenable number.

394157020 is an abundant number, since it is smaller than the sum of its proper divisors (434149844).

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

394157020 is a wasteful number, since it uses less digits than its factorization.

394157020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13749 (or 13747 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 394157020 is about 19853.3881239450. The cubic root of 394157020 is about 733.2010675139.

The spelling of 394157020 in words is "three hundred ninety-four million, one hundred fifty-seven thousand, twenty".