390391775368 has 128 divisors (see below), whose sum is σ = 876338611200. Its totient is φ = 159551195904.

The previous prime is 390391775357. The next prime is 390391775369. The reversal of 390391775368 is 863577193093.

It is a hoax number, since the sum of its digits (61) 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 (390391775369) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42415455 + ... + 42424657.

It is an arithmetic number, because the mean of its divisors is an integer number (6846395400).

Almost surely, 2^390391775368 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 390391775368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (438169305600).

390391775368 is an abundant number, since it is smaller than the sum of its proper divisors (485946835832).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

390391775368 is a wasteful number, since it uses less digits than its factorization.

390391775368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9659 (or 9655 counting only the distinct ones).

The product of its (nonzero) digits is 25719120, while the sum is 61.

The spelling of 390391775368 in words is "three hundred ninety billion, three hundred ninety-one million, seven hundred seventy-five thousand, three hundred sixty-eight".