1320878560 has 48 divisors (see below), whose sum is σ = 3122851536. Its totient is φ = 527966208.

The previous prime is 1320878557. The next prime is 1320878579. The reversal of 1320878560 is 658780231.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

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, 336127 + ... + 340033.

It is an arithmetic number, because the mean of its divisors is an integer number (65059407).

Almost surely, 2^1320878560 is an apocalyptic number.

1320878560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1320878560 is an abundant number, since it is smaller than the sum of its proper divisors (1801972976).

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

1320878560 is a wasteful number, since it uses less digits than its factorization.

1320878560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6035 (or 6027 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 1320878560 is about 36343.8930220746. The cubic root of 1320878560 is about 1097.2046267978.

The spelling of 1320878560 in words is "one billion, three hundred twenty million, eight hundred seventy-eight thousand, five hundred sixty".