22287943440 has 120 divisors (see below), whose sum is σ = 85543268928. Its totient is φ = 5094385920.

The previous prime is 22287943423. The next prime is 22287943477. The reversal of 22287943440 is 4434978222.

It is a happy number.

22287943440 is a `hidden beast` number, since 22 + 287 + 9 + 4 + 344 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 2206066 + ... + 2216145.

Almost surely, 2^22287943440 is an apocalyptic number.

22287943440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22287943440 is an abundant number, since it is smaller than the sum of its proper divisors (63255325488).

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

22287943440 is a wasteful number, since it uses less digits than its factorization.

22287943440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4422237 (or 4422228 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 45.

The spelling of 22287943440 in words is "twenty-two billion, two hundred eighty-seven million, nine hundred forty-three thousand, four hundred forty".