388788 has 24 divisors (see below), whose sum is σ = 917280. Its totient is φ = 128160.

The previous prime is 388781. The next prime is 388789. The reversal of 388788 is 887883.

It is a super-2 number, since 2×388788² = 302312217888, which contains 22 as substring.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 388788.

It is not an unprimeable number, because it can be changed into a prime (388781) by changing a digit.

388788 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2058 + ... + 2238.

It is an arithmetic number, because the mean of its divisors is an integer number (38220).

2³⁸⁸⁷⁸⁸ is an apocalyptic number.

It is an amenable number.

388788 is an abundant number, since it is smaller than the sum of its proper divisors (528492).

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

388788 is a wasteful number, since it uses less digits than its factorization.

388788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367 (or 365 counting only the distinct ones).

The product of its digits is 86016, while the sum is 42.

The square root of 388788 is about 623.5286681461. The cubic root of 388788 is about 72.9856730500.

It can be divided in two parts, 388 and 788, that added together give a triangular number (1176 = T₄₈).

The spelling of 388788 in words is "three hundred eighty-eight thousand, seven hundred eighty-eight".