1315822640 has 80 divisors (see below), whose sum is σ = 3482562816. Its totient is φ = 457670400.

The previous prime is 1315822633. The next prime is 1315822681. The reversal of 1315822640 is 462285131.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 1315822597 and 1315822606.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12266 + ... + 52745.

Almost surely, 2^1315822640 is an apocalyptic number.

1315822640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1315822640 is an abundant number, since it is smaller than the sum of its proper divisors (2166740176).

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

1315822640 is a wasteful number, since it uses less digits than its factorization.

1315822640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65058 (or 65052 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 1315822640 is about 36274.2696687335. The cubic root of 1315822640 is about 1095.8029153497.

The spelling of 1315822640 in words is "one billion, three hundred fifteen million, eight hundred twenty-two thousand, six hundred forty".