390636697680 has 400 divisors, whose sum is σ = 1370010438720. Its totient is φ = 103156291584.

The previous prime is 390636697631. The next prime is 390636697697. The reversal of 390636697680 is 86796636093.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 356094892 + ... + 356095988.

Almost surely, 2^390636697680 is an apocalyptic number.

390636697680 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 390636697680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (685005219360).

390636697680 is an abundant number, since it is smaller than the sum of its proper divisors (979373741040).

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

390636697680 is a wasteful number, since it uses less digits than its factorization.

390636697680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1608 (or 1593 counting only the distinct ones).

The product of its (nonzero) digits is 52907904, while the sum is 63.

The spelling of 390636697680 in words is "three hundred ninety billion, six hundred thirty-six million, six hundred ninety-seven thousand, six hundred eighty".