1307256880 has 40 divisors (see below), whose sum is σ = 3040876800. Its totient is φ = 522643968.

The previous prime is 1307256857. The next prime is 1307256883. The reversal of 1307256880 is 886527031.

It is a tau number, because it is divible by the number of its divisors (40).

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

It is not an unprimeable number, because it can be changed into a prime (1307256883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 312241 + ... + 316399.

It is an arithmetic number, because the mean of its divisors is an integer number (76021920).

Almost surely, 2^1307256880 is an apocalyptic number.

1307256880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1307256880 is an abundant number, since it is smaller than the sum of its proper divisors (1733619920).

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

1307256880 is a wasteful number, since it uses less digits than its factorization.

1307256880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8101 (or 8095 counting only the distinct ones).

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

The square root of 1307256880 is about 36156.0075229553. The cubic root of 1307256880 is about 1093.4199126692.

The spelling of 1307256880 in words is "one billion, three hundred seven million, two hundred fifty-six thousand, eight hundred eighty".