388087817660 has 48 divisors (see below), whose sum is σ = 870283733760. Its totient is φ = 145047275520.

The previous prime is 388087817651. The next prime is 388087817687. The reversal of 388087817660 is 66718780883.

It is a super-2 number, since 2×388087817660² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (62).

It is a junction number, because it is equal to n+sod(n) for n = 388087817593 and 388087817602.

It is a congruent number.

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, 10774229 + ... + 10810188.

It is an arithmetic number, because the mean of its divisors is an integer number (18130911120).

Almost surely, 2^388087817660 is an apocalyptic number.

It is an amenable number.

388087817660 is an abundant number, since it is smaller than the sum of its proper divisors (482195916100).

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

388087817660 is a wasteful number, since it uses less digits than its factorization.

388087817660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21584486 (or 21584484 counting only the distinct ones).

The product of its (nonzero) digits is 21676032, while the sum is 62.

The spelling of 388087817660 in words is "three hundred eighty-eight billion, eighty-seven million, eight hundred seventeen thousand, six hundred sixty".