1388396870 has 24 divisors (see below), whose sum is σ = 2907134064. Its totient is φ = 476021616.

The previous prime is 1388396869. The next prime is 1388396887. The reversal of 1388396870 is 786938831.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 1416242 + ... + 1417221.

It is an arithmetic number, because the mean of its divisors is an integer number (121130586).

Almost surely, 2^1388396870 is an apocalyptic number.

1388396870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1388396870 is an abundant number, since it is smaller than the sum of its proper divisors (1518737194).

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

1388396870 is a wasteful number, since it uses less digits than its factorization.

1388396870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2833484 (or 2833477 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 53.

The square root of 1388396870 is about 37261.1979141841. The cubic root of 1388396870 is about 1115.5898184471.

The spelling of 1388396870 in words is "one billion, three hundred eighty-eight million, three hundred ninety-six thousand, eight hundred seventy".