388249590 has 64 divisors (see below), whose sum is σ = 950019840. Its totient is φ = 101523840.

The previous prime is 388249579. The next prime is 388249613. The reversal of 388249590 is 95942883.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 841960 + ... + 842420.

It is an arithmetic number, because the mean of its divisors is an integer number (14844060).

Almost surely, 2^388249590 is an apocalyptic number.

388249590 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 388249590, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (475009920).

388249590 is an abundant number, since it is smaller than the sum of its proper divisors (561770250).

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

388249590 is a wasteful number, since it uses less digits than its factorization.

388249590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 957.

The product of its (nonzero) digits is 622080, while the sum is 48.

The square root of 388249590 is about 19704.0500912883. The cubic root of 388249590 is about 729.5196627419.

The spelling of 388249590 in words is "three hundred eighty-eight million, two hundred forty-nine thousand, five hundred ninety".