390594681 has 12 divisors (see below), whose sum is σ = 579441252. Its totient is φ = 253358496.

The previous prime is 390594661. The next prime is 390594689. The reversal of 390594681 is 186495093.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 216354681 + 174240000 = 14709^2 + 13200^2 .

It is not a de Polignac number, because 390594681 - 2¹⁰ = 390593657 is a prime.

It is a super-2 number, since 2×390594681² = 305128409650983522, which contains 22 as substring.

It is a hoax number, since the sum of its digits (45) 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 (390594689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 586146 + ... + 586811.

It is an arithmetic number, because the mean of its divisors is an integer number (48286771).

Almost surely, 2^390594681 is an apocalyptic number.

It is an amenable number.

390594681 is a deficient number, since it is larger than the sum of its proper divisors (188846571).

390594681 is a wasteful number, since it uses less digits than its factorization.

390594681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1173000 (or 1172997 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The square root of 390594681 is about 19763.4683443974. The cubic root of 390594681 is about 730.9855213612.

The spelling of 390594681 in words is "three hundred ninety million, five hundred ninety-four thousand, six hundred eighty-one".