1388889376 has 24 divisors (see below), whose sum is σ = 3125001600. Its totient is φ = 595238208.

The previous prime is 1388889349. The next prime is 1388889413. The reversal of 1388889376 is 6739888831.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3099976 + ... + 3100423.

It is an arithmetic number, because the mean of its divisors is an integer number (130208400).

Almost surely, 2^1388889376 is an apocalyptic number.

1388889376 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1388889376 is an abundant number, since it is smaller than the sum of its proper divisors (1736112224).

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

1388889376 is an equidigital number, since it uses as much as digits as its factorization.

1388889376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6200416 (or 6200408 counting only the distinct ones).

The product of its digits is 13934592, while the sum is 61.

The square root of 1388889376 is about 37267.8061602773. The cubic root of 1388889376 is about 1115.7217139056.

The spelling of 1388889376 in words is "one billion, three hundred eighty-eight million, eight hundred eighty-nine thousand, three hundred seventy-six".