1387059856 has 60 divisors (see below), whose sum is σ = 3366693372. Its totient is φ = 548722944.

The previous prime is 1387059841. The next prime is 1387059881. The reversal of 1387059856 is 6589507831.

It can be written as a sum of positive squares in 2 ways, for example, as 263737600 + 1123322256 = 16240^2 + 33516^2 .

It is a Harshad number since it is a multiple of its sum of digits (52).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 57855 + ... + 78238.

Almost surely, 2^1387059856 is an apocalyptic number.

1387059856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1387059856 is an abundant number, since it is smaller than the sum of its proper divisors (1979633516).

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

1387059856 is a wasteful number, since it uses less digits than its factorization.

1387059856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136128 (or 136115 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 52.

The square root of 1387059856 is about 37243.2524895450. The cubic root of 1387059856 is about 1115.2316023683.

The spelling of 1387059856 in words is "one billion, three hundred eighty-seven million, fifty-nine thousand, eight hundred fifty-six".