22312432440 has 96 divisors (see below), whose sum is σ = 72581633280. Its totient is φ = 5944548096.

The previous prime is 22312432333. The next prime is 22312432451. The reversal of 22312432440 is 4423421322.

22312432440 is a `hidden beast` number, since 22 + 312 + 4 + 324 + 4 + 0 = 666.

It is a super-3 number, since 3×22312432440³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

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, 374377 + ... + 429863.

It is an arithmetic number, because the mean of its divisors is an integer number (756058680).

Almost surely, 2^22312432440 is an apocalyptic number.

22312432440 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 22312432440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36290816640).

22312432440 is an abundant number, since it is smaller than the sum of its proper divisors (50269200840).

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

22312432440 is a wasteful number, since it uses less digits than its factorization.

22312432440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56621 (or 56614 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 22312432440 its reverse (4423421322), we get a palindrome (26735853762).

The spelling of 22312432440 in words is "twenty-two billion, three hundred twelve million, four hundred thirty-two thousand, four hundred forty".