388697400 has 576 divisors, whose sum is σ = 1692079200. Its totient is φ = 81285120.

The previous prime is 388697377. The next prime is 388697423. The reversal of 388697400 is 4796883.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (388697377) and next prime (388697423).

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 143 ways as a sum of consecutive naturals, for example, 3439744 + ... + 3439856.

Almost surely, 2^388697400 is an apocalyptic number.

388697400 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 388697400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (846039600).

388697400 is an abundant number, since it is smaller than the sum of its proper divisors (1303381800).

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

388697400 is a wasteful number, since it uses less digits than its factorization.

388697400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165 (or 143 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 388697400 is about 19715.4102163764. The cubic root of 388697400 is about 729.8000327996.

The spelling of 388697400 in words is "three hundred eighty-eight million, six hundred ninety-seven thousand, four hundred".