390312490 has 16 divisors (see below), whose sum is σ = 703374048. Its totient is φ = 155944656.

The previous prime is 390312473. The next prime is 390312491. The reversal of 390312490 is 94213093.

It is not an unprimeable number, because it can be changed into a prime (390312491) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13272 + ... + 30931.

It is an arithmetic number, because the mean of its divisors is an integer number (43960878).

Almost surely, 2^390312490 is an apocalyptic number.

390312490 is a deficient number, since it is larger than the sum of its proper divisors (313061558).

390312490 is a wasteful number, since it uses less digits than its factorization.

390312490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45093.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 390312490 is about 19756.3278470469. The cubic root of 390312490 is about 730.8094417904.

The spelling of 390312490 in words is "three hundred ninety million, three hundred twelve thousand, four hundred ninety".