388804140 has 72 divisors (see below), whose sum is σ = 1211268240. Its totient is φ = 100877184.

The previous prime is 388804133. The next prime is 388804147. The reversal of 388804140 is 41408883.

It is an interprime number because it is at equal distance from previous prime (388804133) and next prime (388804147).

It is a super-2 number, since 2×388804140² = 302337318562279200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 388804095 and 388804104.

It is not an unprimeable number, because it can be changed into a prime (388804147) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22530 + ... + 35849.

It is an arithmetic number, because the mean of its divisors is an integer number (16823170).

Almost surely, 2^388804140 is an apocalyptic number.

388804140 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

388804140 is an abundant number, since it is smaller than the sum of its proper divisors (822464100).

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

388804140 is a wasteful number, since it uses less digits than its factorization.

388804140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58431 (or 58426 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 36.

The square root of 388804140 is about 19718.1170500634. The cubic root of 388804140 is about 729.8668300271.

The spelling of 388804140 in words is "three hundred eighty-eight million, eight hundred four thousand, one hundred forty".