1312698390 has 32 divisors (see below), whose sum is σ = 3151789056. Its totient is φ = 349907040.

The previous prime is 1312698377. The next prime is 1312698403. The reversal of 1312698390 is 938962131.

It is an interprime number because it is at equal distance from previous prime (1312698377) and next prime (1312698403).

It is a congruent number.

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, 77595 + ... + 92985.

It is an arithmetic number, because the mean of its divisors is an integer number (98493408).

Almost surely, 2^1312698390 is an apocalyptic number.

1312698390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1312698390 is an abundant number, since it is smaller than the sum of its proper divisors (1839090666).

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

1312698390 is a wasteful number, since it uses less digits than its factorization.

1312698390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18244.

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 1312698390 is about 36231.1798041411. The cubic root of 1312698390 is about 1094.9349474500.

The spelling of 1312698390 in words is "one billion, three hundred twelve million, six hundred ninety-eight thousand, three hundred ninety".