386888721408 has 616 divisors, whose sum is σ = 1353161980800. Its totient is φ = 110466478080.

The previous prime is 386888721407. The next prime is 386888721409. The reversal of 386888721408 is 804127888683.

386888721408 is a `hidden beast` number, since 3 + 86 + 8 + 88 + 72 + 1 + 408 = 666.

It is an interprime number because it is at equal distance from previous prime (386888721407) and next prime (386888721409).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (386888721403) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 256047373 + ... + 256048883.

Almost surely, 2^386888721408 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 386888721408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (676580990400).

386888721408 is an abundant number, since it is smaller than the sum of its proper divisors (966273259392).

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

386888721408 is an frugal number, since it uses more digits than its factorization.

386888721408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1570 (or 1523 counting only the distinct ones).

The product of its (nonzero) digits is 33030144, while the sum is 63.

The spelling of 386888721408 in words is "three hundred eighty-six billion, eight hundred eighty-eight million, seven hundred twenty-one thousand, four hundred eight".