1555728960 has 56 divisors (see below), whose sum is σ = 4939442496. Its totient is φ = 414860800.

The previous prime is 1555728943. The next prime is 1555729001. The reversal of 1555728960 is 698275551.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

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 7 ways as a sum of consecutive naturals, for example, 809316 + ... + 811235.

Almost surely, 2^1555728960 is an apocalyptic number.

1555728960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1555728960 is an abundant number, since it is smaller than the sum of its proper divisors (3383713536).

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

1555728960 is a wasteful number, since it uses less digits than its factorization.

1555728960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1620571 (or 1620561 counting only the distinct ones).

The product of its (nonzero) digits is 756000, while the sum is 48.

The square root of 1555728960 is about 39442.7301286308. The cubic root of 1555728960 is about 1158.7186008721.

The spelling of 1555728960 in words is "one billion, five hundred fifty-five million, seven hundred twenty-eight thousand, nine hundred sixty".