1312850640 has 80 divisors (see below), whose sum is σ = 4073364288. Its totient is φ = 349790208.

The previous prime is 1312850639. The next prime is 1312850647. The reversal of 1312850640 is 460582131.

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

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1312850598 and 1312850607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312850647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 475504 + ... + 478256.

Almost surely, 2^1312850640 is an apocalyptic number.

1312850640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1312850640 is an abundant number, since it is smaller than the sum of its proper divisors (2760513648).

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

1312850640 is a wasteful number, since it uses less digits than its factorization.

1312850640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4756 (or 4750 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 1312850640 is about 36233.2808340619. The cubic root of 1312850640 is about 1094.9772768997.

The spelling of 1312850640 in words is "one billion, three hundred twelve million, eight hundred fifty thousand, six hundred forty".