388816490 has 16 divisors (see below), whose sum is σ = 711732960. Its totient is φ = 152890320.

The previous prime is 388816487. The next prime is 388816507. The reversal of 388816490 is 94618883.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 328916 + ... + 330095.

It is an arithmetic number, because the mean of its divisors is an integer number (44483310).

Almost surely, 2^388816490 is an apocalyptic number.

388816490 is a deficient number, since it is larger than the sum of its proper divisors (322916470).

388816490 is a wasteful number, since it uses less digits than its factorization.

388816490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 659077.

The product of its (nonzero) digits is 331776, while the sum is 47.

The square root of 388816490 is about 19718.4302113530. The cubic root of 388816490 is about 729.8745577911.

The spelling of 388816490 in words is "three hundred eighty-eight million, eight hundred sixteen thousand, four hundred ninety".