390761289 has 6 divisors (see below), whose sum is σ = 564432986. Its totient is φ = 260507520.

The previous prime is 390761279. The next prime is 390761311. The reversal of 390761289 is 982167093.

It can be written as a sum of positive squares in only one way, i.e., 390260025 + 501264 = 19755^2 + 708^2 .

It is not a de Polignac number, because 390761289 - 2¹² = 390757193 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (390761279) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21708952 + ... + 21708969.

Almost surely, 2^390761289 is an apocalyptic number.

It is an amenable number.

390761289 is a deficient number, since it is larger than the sum of its proper divisors (173671697).

390761289 is a wasteful number, since it uses less digits than its factorization.

390761289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43417927 (or 43417924 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The square root of 390761289 is about 19767.6829446448. The cubic root of 390761289 is about 731.0894404446.

The spelling of 390761289 in words is "three hundred ninety million, seven hundred sixty-one thousand, two hundred eighty-nine".