390740028 has 48 divisors (see below), whose sum is σ = 1043664384. Its totient is φ = 111458880.

The previous prime is 390740003. The next prime is 390740033. The reversal of 390740028 is 820047093.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53433 + ... + 60303.

It is an arithmetic number, because the mean of its divisors is an integer number (21743008).

Almost surely, 2^390740028 is an apocalyptic number.

It is an amenable number.

390740028 is an abundant number, since it is smaller than the sum of its proper divisors (652924356).

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

390740028 is a wasteful number, since it uses less digits than its factorization.

390740028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7562 (or 7560 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 390740028 is about 19767.1451656530. The cubic root of 390740028 is about 731.0761808792.

The spelling of 390740028 in words is "three hundred ninety million, seven hundred forty thousand, twenty-eight".