1215680560 has 40 divisors (see below), whose sum is σ = 2831979456. Its totient is φ = 485322240.

The previous prime is 1215680549. The next prime is 1215680561. The reversal of 1215680560 is 650865121.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (1215680561) 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, 27097 + ... + 56263.

Almost surely, 2^1215680560 is an apocalyptic number.

1215680560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1215680560 is an abundant number, since it is smaller than the sum of its proper divisors (1616298896).

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

1215680560 is a wasteful number, since it uses less digits than its factorization.

1215680560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29701 (or 29695 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 34.

The square root of 1215680560 is about 34866.6109623519. The cubic root of 1215680560 is about 1067.2671870245.

The spelling of 1215680560 in words is "one billion, two hundred fifteen million, six hundred eighty thousand, five hundred sixty".