390390730 has 16 divisors (see below), whose sum is σ = 733256064. Its totient is φ = 149366800.

The previous prime is 390390697. The next prime is 390390769. The reversal of 390390730 is 37093093.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 848446 + ... + 848905.

It is an arithmetic number, because the mean of its divisors is an integer number (45828504).

Almost surely, 2^390390730 is an apocalyptic number.

390390730 is a deficient number, since it is larger than the sum of its proper divisors (342865334).

390390730 is a wasteful number, since it uses less digits than its factorization.

390390730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1697381.

The product of its (nonzero) digits is 15309, while the sum is 34.

The square root of 390390730 is about 19758.3078728924. The cubic root of 390390730 is about 730.8582699406.

The spelling of 390390730 in words is "three hundred ninety million, three hundred ninety thousand, seven hundred thirty".