388888530 has 16 divisors (see below), whose sum is σ = 933332544. Its totient is φ = 103703600.

The previous prime is 388888519. The next prime is 388888541. The reversal of 388888530 is 35888883.

It is an interprime number because it is at equal distance from previous prime (388888519) and next prime (388888541).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6481446 + ... + 6481505.

It is an arithmetic number, because the mean of its divisors is an integer number (58333284).

Almost surely, 2^388888530 is an apocalyptic number.

388888530 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

388888530 is an abundant number, since it is smaller than the sum of its proper divisors (544444014).

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

388888530 is a wasteful number, since it uses less digits than its factorization.

388888530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12962961.

The product of its (nonzero) digits is 1474560, while the sum is 51.

The square root of 388888530 is about 19720.2568441691. The cubic root of 388888530 is about 729.9196321107.

The spelling of 388888530 in words is "three hundred eighty-eight million, eight hundred eighty-eight thousand, five hundred thirty".