390139428 has 48 divisors (see below), whose sum is σ = 1048592384. Its totient is φ = 110587680.

The previous prime is 390139427. The next prime is 390139429. The reversal of 390139428 is 824931093.

It is an interprime number because it is at equal distance from previous prime (390139427) and next prime (390139429).

It is not an unprimeable number, because it can be changed into a prime (390139423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7618 + ... + 28953.

Almost surely, 2^390139428 is an apocalyptic number.

It is an amenable number.

390139428 is an abundant number, since it is smaller than the sum of its proper divisors (658452956).

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

390139428 is a wasteful number, since it uses less digits than its factorization.

390139428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36712 (or 36710 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 390139428 is about 19751.9474482898. The cubic root of 390139428 is about 730.7014137836.

The spelling of 390139428 in words is "three hundred ninety million, one hundred thirty-nine thousand, four hundred twenty-eight".