388399536 has 280 divisors, whose sum is σ = 1327129344. Its totient is φ = 107775360.

The previous prime is 388399489. The next prime is 388399541. The reversal of 388399536 is 635993883.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 5470381 + ... + 5470451.

Almost surely, 2^388399536 is an apocalyptic number.

388399536 is a gapful number since it is divisible by the number (36) 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 388399536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (663564672).

388399536 is an abundant number, since it is smaller than the sum of its proper divisors (938729808).

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

388399536 is an equidigital number, since it uses as much as digits as its factorization.

388399536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171 (or 150 counting only the distinct ones).

The product of its digits is 4199040, while the sum is 54.

The square root of 388399536 is about 19707.8546777674. The cubic root of 388399536 is about 729.6135666626.

The spelling of 388399536 in words is "three hundred eighty-eight million, three hundred ninety-nine thousand, five hundred thirty-six".