1312718658 has 32 divisors (see below), whose sum is σ = 2673287232. Its totient is φ = 429624000.

The previous prime is 1312718657. The next prime is 1312718677. The reversal of 1312718658 is 8568172131.

It is a super-2 number, since 2×1312718658² = 3446460550122641928, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1312718657) 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, 221433 + ... + 227283.

It is an arithmetic number, because the mean of its divisors is an integer number (83540226).

Almost surely, 2^1312718658 is an apocalyptic number.

1312718658 is an abundant number, since it is smaller than the sum of its proper divisors (1360568574).

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

1312718658 is a wasteful number, since it uses less digits than its factorization.

1312718658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6530.

The product of its digits is 80640, while the sum is 42.

The square root of 1312718658 is about 36231.4595068981. The cubic root of 1312718658 is about 1094.9405826686.

The spelling of 1312718658 in words is "one billion, three hundred twelve million, seven hundred eighteen thousand, six hundred fifty-eight".