1388900139 has 16 divisors (see below), whose sum is σ = 2058338304. Its totient is φ = 825874400.

The previous prime is 1388900131. The next prime is 1388900141. The reversal of 1388900139 is 9310098831.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1388900139 - 2³ = 1388900131 is a prime.

It is a super-2 number, since 2×1388900139² = 3858087192228438642, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1388900139.

It is not an unprimeable number, because it can be changed into a prime (1388900131) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 395307 + ... + 398804.

It is an arithmetic number, because the mean of its divisors is an integer number (128646144).

Almost surely, 2^1388900139 is an apocalyptic number.

1388900139 is a deficient number, since it is larger than the sum of its proper divisors (669438165).

1388900139 is a wasteful number, since it uses less digits than its factorization.

1388900139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 794178.

The product of its (nonzero) digits is 46656, while the sum is 42.

The square root of 1388900139 is about 37267.9505607700. The cubic root of 1388900139 is about 1115.7245959402.

The spelling of 1388900139 in words is "one billion, three hundred eighty-eight million, nine hundred thousand, one hundred thirty-nine".