390347128 has 16 divisors (see below), whose sum is σ = 738742680. Its totient is φ = 193349088.

The previous prime is 390347117. The next prime is 390347129. The reversal of 390347128 is 821743093.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390347129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 227151 + ... + 228862.

Almost surely, 2^390347128 is an apocalyptic number.

It is an amenable number.

390347128 is a deficient number, since it is larger than the sum of its proper divisors (348395552).

390347128 is a wasteful number, since it uses less digits than its factorization.

390347128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456126 (or 456122 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 390347128 is about 19757.2044581211. The cubic root of 390347128 is about 730.8310595363.

The spelling of 390347128 in words is "three hundred ninety million, three hundred forty-seven thousand, one hundred twenty-eight".