390428899 has 32 divisors (see below), whose sum is σ = 468840960. Its totient is φ = 318269952.

The previous prime is 390428873. The next prime is 390428903. The reversal of 390428899 is 998824093.

It is not a de Polignac number, because 390428899 - 2⁵ = 390428867 is a prime.

It is not an unprimeable number, because it can be changed into a prime (390428839) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2808772 + ... + 2808910.

It is an arithmetic number, because the mean of its divisors is an integer number (14651280).

Almost surely, 2^390428899 is an apocalyptic number.

390428899 is a deficient number, since it is larger than the sum of its proper divisors (78412061).

390428899 is a wasteful number, since it uses less digits than its factorization.

390428899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379.

The product of its (nonzero) digits is 1119744, while the sum is 52.

The square root of 390428899 is about 19759.2737467752. The cubic root of 390428899 is about 730.8820881463.

The spelling of 390428899 in words is "three hundred ninety million, four hundred twenty-eight thousand, eight hundred ninety-nine".