388042179840 has 324 divisors, whose sum is σ = 1561785429204. Its totient is φ = 88695226368.

The previous prime is 388042179821. The next prime is 388042179857. The reversal of 388042179840 is 48971240883.

It is a happy number.

388042179840 is a `hidden beast` number, since 38 + 80 + 421 + 79 + 8 + 40 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 293729313024 + 94312866816 = 541968^2 + 307104^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 220764 + ... + 908196.

Almost surely, 2^388042179840 is an apocalyptic number.

388042179840 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 388042179840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (780892714602).

388042179840 is an abundant number, since it is smaller than the sum of its proper divisors (1173743249364).

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

388042179840 is a wasteful number, since it uses less digits than its factorization.

388042179840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 687474 (or 687450 counting only the distinct ones).

The product of its (nonzero) digits is 3096576, while the sum is 54.

The spelling of 388042179840 in words is "three hundred eighty-eight billion, forty-two million, one hundred seventy-nine thousand, eight hundred forty".