390426761 has 4 divisors (see below), whose sum is σ = 390570132. Its totient is φ = 390283392.

The previous prime is 390426733. The next prime is 390426787. The reversal of 390426761 is 167624093.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 225150025 + 165276736 = 15005^2 + 12856^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-390426761 is a prime.

It is a super-2 number, since 2×390426761² = 304866111409902242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (390426721) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 67520 + ... + 73073.

It is an arithmetic number, because the mean of its divisors is an integer number (97642533).

Almost surely, 2^390426761 is an apocalyptic number.

It is an amenable number.

390426761 is a deficient number, since it is larger than the sum of its proper divisors (143371).

390426761 is a wasteful number, since it uses less digits than its factorization.

390426761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143370.

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 390426761 is about 19759.2196455224. The cubic root of 390426761 is about 730.8807540334.

The spelling of 390426761 in words is "three hundred ninety million, four hundred twenty-six thousand, seven hundred sixty-one".