1312478850 has 48 divisors (see below), whose sum is σ = 3266165952. Its totient is φ = 348788160.

The previous prime is 1312478801. The next prime is 1312478861. The reversal of 1312478850 is 588742131.

It is a junction number, because it is equal to n+sod(n) for n = 1312478799 and 1312478808.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29019 + ... + 58881.

It is an arithmetic number, because the mean of its divisors is an integer number (68045124).

Almost surely, 2^1312478850 is an apocalyptic number.

1312478850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1312478850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1633082976).

1312478850 is an abundant number, since it is smaller than the sum of its proper divisors (1953687102).

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

1312478850 is a wasteful number, since it uses less digits than its factorization.

1312478850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30171 (or 30166 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 39.

The square root of 1312478850 is about 36228.1499665661. The cubic root of 1312478850 is about 1094.8739038718.

The spelling of 1312478850 in words is "one billion, three hundred twelve million, four hundred seventy-eight thousand, eight hundred fifty".