390005870525 has 12 divisors (see below), whose sum is σ = 486687585492. Its totient is φ = 310017402240.

The previous prime is 390005870503. The next prime is 390005870531. The reversal of 390005870525 is 525078500093.

It can be written as a sum of positive squares in 6 ways, for example, as 44725059289 + 345280811236 = 211483^2 + 587606^2 .

It is not a de Polignac number, because 390005870525 - 2²⁰ = 390004821949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49678352 + ... + 49686201.

It is an arithmetic number, because the mean of its divisors is an integer number (40557298791).

Almost surely, 2^390005870525 is an apocalyptic number.

It is an amenable number.

390005870525 is a deficient number, since it is larger than the sum of its proper divisors (96681714967).

390005870525 is a wasteful number, since it uses less digits than its factorization.

390005870525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99364720 (or 99364715 counting only the distinct ones).

The product of its (nonzero) digits is 378000, while the sum is 44.

The spelling of 390005870525 in words is "three hundred ninety billion, five million, eight hundred seventy thousand, five hundred twenty-five".