394428051 has 6 divisors (see below), whose sum is σ = 569729420. Its totient is φ = 262952028.

The previous prime is 394428019. The next prime is 394428059. The reversal of 394428051 is 150824493.

It is not a de Polignac number, because 394428051 - 2⁵ = 394428019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 394427997 and 394428015.

It is not an unprimeable number, because it can be changed into a prime (394428059) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21912661 + ... + 21912678.

Almost surely, 2^394428051 is an apocalyptic number.

394428051 is a deficient number, since it is larger than the sum of its proper divisors (175301369).

394428051 is a wasteful number, since it uses less digits than its factorization.

394428051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43825345 (or 43825342 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 394428051 is about 19860.2127632108. The cubic root of 394428051 is about 733.3690840468.

The spelling of 394428051 in words is "three hundred ninety-four million, four hundred twenty-eight thousand, fifty-one".