390143128 has 16 divisors (see below), whose sum is σ = 748531080. Its totient is φ = 190534848.

The previous prime is 390143113. The next prime is 390143137. The reversal of 390143128 is 821341093.

It is a self number, because there is not a number n which added to its sum of digits gives 390143128.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 566725 + ... + 567412.

Almost surely, 2^390143128 is an apocalyptic number.

It is an amenable number.

390143128 is a deficient number, since it is larger than the sum of its proper divisors (358387952).

390143128 is a wasteful number, since it uses less digits than its factorization.

390143128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1134186 (or 1134182 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 390143128 is about 19752.0411097183. The cubic root of 390143128 is about 730.7037237157.

The spelling of 390143128 in words is "three hundred ninety million, one hundred forty-three thousand, one hundred twenty-eight".