388849680 has 80 divisors (see below), whose sum is σ = 1339378560. Its totient is φ = 103692672.

The previous prime is 388849673. The next prime is 388849691. The reversal of 388849680 is 86948883.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×388849680² = 302408147272204800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87852 + ... + 92171.

It is an arithmetic number, because the mean of its divisors is an integer number (16742232).

Almost surely, 2^388849680 is an apocalyptic number.

388849680 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

388849680 is an abundant number, since it is smaller than the sum of its proper divisors (950528880).

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

388849680 is a wasteful number, since it uses less digits than its factorization.

388849680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180045 (or 180033 counting only the distinct ones).

The product of its (nonzero) digits is 2654208, while the sum is 54.

The square root of 388849680 is about 19719.2717918284. The cubic root of 388849680 is about 729.8953249550.

The spelling of 388849680 in words is "three hundred eighty-eight million, eight hundred forty-nine thousand, six hundred eighty".