388718406 has 24 divisors (see below), whose sum is σ = 864140760. Its totient is φ = 129524508.

The previous prime is 388718401. The next prime is 388718431. The reversal of 388718406 is 604817883.

It is a super-2 number, since 2×388718406² = 302203998326361672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388718401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 143541 + ... + 146223.

It is an arithmetic number, because the mean of its divisors is an integer number (36005865).

Almost surely, 2^388718406 is an apocalyptic number.

388718406 is an abundant number, since it is smaller than the sum of its proper divisors (475422354).

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

388718406 is an frugal number, since it uses more digits than its factorization.

388718406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5377 (or 2688 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 45.

The square root of 388718406 is about 19715.9429396618. The cubic root of 388718406 is about 729.8131791900.

The spelling of 388718406 in words is "three hundred eighty-eight million, seven hundred eighteen thousand, four hundred six".