1387557480 has 64 divisors (see below), whose sum is σ = 4212855360. Its totient is φ = 365554688.

The previous prime is 1387557469. The next prime is 1387557491. The reversal of 1387557480 is 847557831.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1387557469) and next prime (1387557491).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59697 + ... + 79616.

It is an arithmetic number, because the mean of its divisors is an integer number (65825865).

Almost surely, 2^1387557480 is an apocalyptic number.

1387557480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1387557480 is an abundant number, since it is smaller than the sum of its proper divisors (2825297880).

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

1387557480 is a wasteful number, since it uses less digits than its factorization.

1387557480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139410 (or 139406 counting only the distinct ones).

The product of its (nonzero) digits is 940800, while the sum is 48.

The square root of 1387557480 is about 37249.9326173887. The cubic root of 1387557480 is about 1115.3649538971.

The spelling of 1387557480 in words is "one billion, three hundred eighty-seven million, five hundred fifty-seven thousand, four hundred eighty".