1315609780 has 24 divisors (see below), whose sum is σ = 2908190880. Its totient is φ = 498546720.

The previous prime is 1315609769. The next prime is 1315609793. The reversal of 1315609780 is 879065131.

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, 1730686 + ... + 1731445.

It is an arithmetic number, because the mean of its divisors is an integer number (121174620).

Almost surely, 2^1315609780 is an apocalyptic number.

1315609780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1315609780 is an abundant number, since it is smaller than the sum of its proper divisors (1592581100).

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

1315609780 is a wasteful number, since it uses less digits than its factorization.

1315609780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3462159 (or 3462157 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 40.

The square root of 1315609780 is about 36271.3355144252. The cubic root of 1315609780 is about 1095.7438229917.

The spelling of 1315609780 in words is "one billion, three hundred fifteen million, six hundred nine thousand, seven hundred eighty".