1387100808 has 32 divisors (see below), whose sum is σ = 3853058400. Its totient is φ = 462366864.

The previous prime is 1387100773. The next prime is 1387100851. The reversal of 1387100808 is 8080017831.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3210666 + ... + 3211097.

It is an arithmetic number, because the mean of its divisors is an integer number (120408075).

Almost surely, 2^1387100808 is an apocalyptic number.

1387100808 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1387100808 is an abundant number, since it is smaller than the sum of its proper divisors (2465957592).

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

1387100808 is a wasteful number, since it uses less digits than its factorization.

1387100808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6421778 (or 6421768 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 36.

The square root of 1387100808 is about 37243.8022763520. The cubic root of 1387100808 is about 1115.2425777454.

The spelling of 1387100808 in words is "one billion, three hundred eighty-seven million, one hundred thousand, eight hundred eight".