1388888870 has 16 divisors (see below), whose sum is σ = 2540984688. Its totient is φ = 546447840.

The previous prime is 1388888867. The next prime is 1388888881. The reversal of 1388888870 is 788888831.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1137824 + ... + 1139043.

It is an arithmetic number, because the mean of its divisors is an integer number (158811543).

Almost surely, 2^1388888870 is an apocalyptic number.

1388888870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1388888870 is a deficient number, since it is larger than the sum of its proper divisors (1152095818).

1388888870 is a wasteful number, since it uses less digits than its factorization.

1388888870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2276935.

The product of its (nonzero) digits is 5505024, while the sum is 59.

The square root of 1388888870 is about 37267.7993715755. The cubic root of 1388888870 is about 1115.7215784123.

The spelling of 1388888870 in words is "one billion, three hundred eighty-eight million, eight hundred eighty-eight thousand, eight hundred seventy".