390392073 has 12 divisors (see below), whose sum is σ = 564988788. Its totient is φ = 259758720.

The previous prime is 390392071. The next prime is 390392089. The reversal of 390392073 is 370293093.

It can be written as a sum of positive squares in 2 ways, for example, as 235837449 + 154554624 = 15357^2 + 12432^2 .

It is not a de Polignac number, because 390392073 - 2¹ = 390392071 is a prime.

It is a super-2 number, since 2×390392073² = 304811941322474658, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (390392071) 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 11 ways as a sum of consecutive naturals, for example, 36940 + ... + 46317.

It is an arithmetic number, because the mean of its divisors is an integer number (47082399).

Almost surely, 2^390392073 is an apocalyptic number.

It is an amenable number.

390392073 is a deficient number, since it is larger than the sum of its proper divisors (174596715).

390392073 is a wasteful number, since it uses less digits than its factorization.

390392073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83784 (or 83781 counting only the distinct ones).

The product of its (nonzero) digits is 30618, while the sum is 36.

The square root of 390392073 is about 19758.3418585670. The cubic root of 390392073 is about 730.8591080253.

The spelling of 390392073 in words is "three hundred ninety million, three hundred ninety-two thousand, seventy-three".