390377682 has 18 divisors (see below), whose sum is σ = 845999973. Its totient is φ = 130097952.

The previous prime is 390377657. The next prime is 390377719. The reversal of 390377682 is 286773093.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 322166601 + 68211081 = 17949^2 + 8259^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=13971.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 81498 + ... + 86154.

Almost surely, 2^390377682 is an apocalyptic number.

390377682 is an abundant number, since it is smaller than the sum of its proper divisors (455622291).

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

390377682 is an frugal number, since it uses more digits than its factorization.

390377682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9322 (or 4662 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 45.

The square root of 390377682 is about 19757.9776799145. The cubic root of 390377682 is about 730.8501273762.

The spelling of 390377682 in words is "three hundred ninety million, three hundred seventy-seven thousand, six hundred eighty-two".