1215828560 has 40 divisors (see below), whose sum is σ = 2832303840. Its totient is φ = 485384832.

The previous prime is 1215828529. The next prime is 1215828577. The reversal of 1215828560 is 658285121.

It is a tau number, because it is divible by the number of its divisors (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, 27311 + ... + 56369.

It is an arithmetic number, because the mean of its divisors is an integer number (70807596).

Almost surely, 2^1215828560 is an apocalyptic number.

1215828560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1215828560 is an abundant number, since it is smaller than the sum of its proper divisors (1616475280).

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

1215828560 is a wasteful number, since it uses less digits than its factorization.

1215828560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29595 (or 29589 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 38.

The square root of 1215828560 is about 34868.7332720878. The cubic root of 1215828560 is about 1067.3104958616.

The spelling of 1215828560 in words is "one billion, two hundred fifteen million, eight hundred twenty-eight thousand, five hundred sixty".