388485720 has 240 divisors, whose sum is σ = 1519547040. Its totient is φ = 88760448.

The previous prime is 388485689. The next prime is 388485743. The reversal of 388485720 is 27584883.

388485720 is a `hidden beast` number, since 38 + 8 + 48 + 572 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 157537 + ... + 159983.

It is an arithmetic number, because the mean of its divisors is an integer number (6331446).

Almost surely, 2^388485720 is an apocalyptic number.

388485720 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 388485720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (759773520).

388485720 is an abundant number, since it is smaller than the sum of its proper divisors (1131061320).

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

388485720 is a wasteful number, since it uses less digits than its factorization.

388485720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2484 (or 2464 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 45.

The square root of 388485720 is about 19710.0410958476. The cubic root of 388485720 is about 729.6675285921.

The spelling of 388485720 in words is "three hundred eighty-eight million, four hundred eighty-five thousand, seven hundred twenty".