388400075 has 24 divisors (see below), whose sum is σ = 551250432. Its totient is φ = 265929120.

The previous prime is 388400053. The next prime is 388400081. The reversal of 388400075 is 570004883.

It is not a de Polignac number, because 388400075 - 2⁸ = 388399819 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 157502 + ... + 159948.

It is an arithmetic number, because the mean of its divisors is an integer number (22968768).

Almost surely, 2^388400075 is an apocalyptic number.

388400075 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

388400075 is a deficient number, since it is larger than the sum of its proper divisors (162850357).

388400075 is a wasteful number, since it uses less digits than its factorization.

388400075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3371 (or 3366 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 388400075 is about 19707.8683525134. The cubic root of 388400075 is about 729.6139041686.

The spelling of 388400075 in words is "three hundred eighty-eight million, four hundred thousand, seventy-five".