388404720 has 200 divisors, whose sum is σ = 1471892400. Its totient is φ = 94141440.

The previous prime is 388404697. The next prime is 388404739. The reversal of 388404720 is 27404883.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 68556 + ... + 74004.

It is an arithmetic number, because the mean of its divisors is an integer number (7359462).

Almost surely, 2^388404720 is an apocalyptic number.

388404720 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 388404720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (735946200).

388404720 is an abundant number, since it is smaller than the sum of its proper divisors (1083487680).

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

388404720 is a wasteful number, since it uses less digits than its factorization.

388404720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5485 (or 5470 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 36.

The square root of 388404720 is about 19707.9861984932. The cubic root of 388404720 is about 729.6168127185.

The spelling of 388404720 in words is "three hundred eighty-eight million, four hundred four thousand, seven hundred twenty".