1312447400 has 96 divisors (see below), whose sum is σ = 3366748800. Its totient is φ = 471820800.

The previous prime is 1312447399. The next prime is 1312447421. The reversal of 1312447400 is 47442131.

It is a self number, because there is not a number n which added to its sum of digits gives 1312447400.

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, 192449 + ... + 199151.

It is an arithmetic number, because the mean of its divisors is an integer number (35070300).

Almost surely, 2^1312447400 is an apocalyptic number.

1312447400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1312447400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1683374400).

1312447400 is an abundant number, since it is smaller than the sum of its proper divisors (2054301400).

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

1312447400 is a wasteful number, since it uses less digits than its factorization.

1312447400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6819 (or 6810 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 1312447400 is about 36227.7159092317. The cubic root of 1312447400 is about 1094.8651585730.

Adding to 1312447400 its reverse (47442131), we get a palindrome (1359889531).

The spelling of 1312447400 in words is "one billion, three hundred twelve million, four hundred forty-seven thousand, four hundred".