388959990 has 16 divisors (see below), whose sum is σ = 933504048. Its totient is φ = 103722656.

The previous prime is 388959959. The next prime is 388959997. The reversal of 388959990 is 99959883.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388959997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6482637 + ... + 6482696.

It is an arithmetic number, because the mean of its divisors is an integer number (58344003).

Almost surely, 2^388959990 is an apocalyptic number.

388959990 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

388959990 is an abundant number, since it is smaller than the sum of its proper divisors (544544058).

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

388959990 is a wasteful number, since it uses less digits than its factorization.

388959990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12965343.

The product of its (nonzero) digits is 6298560, while the sum is 60.

The square root of 388959990 is about 19722.0686034706. The cubic root of 388959990 is about 729.9643380339.

The spelling of 388959990 in words is "three hundred eighty-eight million, nine hundred fifty-nine thousand, nine hundred ninety".