2312134440 has 256 divisors, whose sum is σ = 8883025920. Its totient is φ = 467389440.

The previous prime is 2312134439. The next prime is 2312134463. The reversal of 2312134440 is 444312132.

It is a super-2 number, since 2×2312134440² = 10691931337268227200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 2312134440.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 338499 + ... + 345261.

It is an arithmetic number, because the mean of its divisors is an integer number (34699320).

Almost surely, 2^2312134440 is an apocalyptic number.

2312134440 is a gapful number since it is divisible by the number (20) 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 2312134440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4441512960).

2312134440 is an abundant number, since it is smaller than the sum of its proper divisors (6570891480).

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

2312134440 is a wasteful number, since it uses less digits than its factorization.

2312134440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6832 (or 6828 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 2312134440 is about 48084.6590920639. The cubic root of 2312134440 is about 1322.3234332001.

Adding to 2312134440 its reverse (444312132), we get a palindrome (2756446572).

The spelling of 2312134440 in words is "two billion, three hundred twelve million, one hundred thirty-four thousand, four hundred forty".