390305562242 has 18 divisors (see below), whose sum is σ = 612051646563. Its totient is φ = 186658158852.

The previous prime is 390305562233. The next prime is 390305562253. The reversal of 390305562242 is 242265503093.

It can be written as a sum of positive squares in only one way, i.e., 195152781121 + 195152781121 = 441761^2 + 441761^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=441761.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 390305562242.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 20311403 + ... + 20330609.

Almost surely, 2^390305562242 is an apocalyptic number.

390305562242 is a deficient number, since it is larger than the sum of its proper divisors (221746084321).

390305562242 is an frugal number, since it uses more digits than its factorization.

390305562242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38462 (or 19232 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 41.

The spelling of 390305562242 in words is "three hundred ninety billion, three hundred five million, five hundred sixty-two thousand, two hundred forty-two".