390385774331 has 24 divisors (see below), whose sum is σ = 462972937680. Its totient is φ = 328102512192.

The previous prime is 390385774307. The next prime is 390385774333. The reversal of 390385774331 is 133477583093.

It is a de Polignac number, because none of the positive numbers 2^k-390385774331 is a prime.

It is a super-2 number, since 2×390385774331² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (390385774333) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4289360 + ... + 4379426.

It is an arithmetic number, because the mean of its divisors is an integer number (19290539070).

Almost surely, 2^390385774331 is an apocalyptic number.

390385774331 is a deficient number, since it is larger than the sum of its proper divisors (72587163349).

390385774331 is a wasteful number, since it uses less digits than its factorization.

390385774331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91803 (or 91796 counting only the distinct ones).

The product of its (nonzero) digits is 5715360, while the sum is 53.

The spelling of 390385774331 in words is "three hundred ninety billion, three hundred eighty-five million, seven hundred seventy-four thousand, three hundred thirty-one".