388135944 has 48 divisors (see below), whose sum is σ = 1201374720. Its totient is φ = 110895840.

The previous prime is 388135877. The next prime is 388135949. The reversal of 388135944 is 449531883.

It is a super-2 number, since 2×388135944² = 301299022049542272, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 388135944.

It is not an unprimeable number, because it can be changed into a prime (388135949) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 384552 + ... + 385559.

It is an arithmetic number, because the mean of its divisors is an integer number (25028640).

Almost surely, 2^388135944 is an apocalyptic number.

It is an amenable number.

388135944 is an abundant number, since it is smaller than the sum of its proper divisors (813238776).

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

388135944 is a wasteful number, since it uses less digits than its factorization.

388135944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 770130 (or 770123 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The square root of 388135944 is about 19701.1660568607. The cubic root of 388135944 is about 729.4484756462.

The spelling of 388135944 in words is "three hundred eighty-eight million, one hundred thirty-five thousand, nine hundred forty-four".