1387399088 has 20 divisors (see below), whose sum is σ = 2712750480. Its totient is φ = 687334464.

The previous prime is 1387399049. The next prime is 1387399103. The reversal of 1387399088 is 8809937831.

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 3 ways as a sum of consecutive naturals, for example, 396020 + ... + 399507.

It is an arithmetic number, because the mean of its divisors is an integer number (135637524).

Almost surely, 2^1387399088 is an apocalyptic number.

It is an amenable number.

1387399088 is a deficient number, since it is larger than the sum of its proper divisors (1325351392).

1387399088 is a wasteful number, since it uses less digits than its factorization.

1387399088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 795644 (or 795638 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 56.

The square root of 1387399088 is about 37247.8064857516. The cubic root of 1387399088 is about 1115.3225120257.

The spelling of 1387399088 in words is "one billion, three hundred eighty-seven million, three hundred ninety-nine thousand, eighty-eight".