388977897893648 has 80 divisors (see below), whose sum is σ = 870229098856320. Its totient is φ = 164978351935488.

The previous prime is 388977897893633. The next prime is 388977897893707. The reversal of 388977897893648 is 846398798779883.

It is a super-2 number, since 2×388977897893648² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 230224715 + ... + 231908117.

It is an arithmetic number, because the mean of its divisors is an integer number (10877863735704).

Almost surely, 2^{388977897893648} 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 388977897893648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (435114549428160).

388977897893648 is an abundant number, since it is smaller than the sum of its proper divisors (481251200962672).

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

388977897893648 is a wasteful number, since it uses less digits than its factorization.

388977897893648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1704784 (or 1704778 counting only the distinct ones).

The product of its digits is 1769804660736, while the sum is 104.

The spelling of 388977897893648 in words is "three hundred eighty-eight trillion, nine hundred seventy-seven billion, eight hundred ninety-seven million, eight hundred ninety-three thousand, six hundred forty-eight".