22756440 has 64 divisors (see below), whose sum is σ = 78024960. Its totient is φ = 5201280.

The previous prime is 22756427. The next prime is 22756441. The reversal of 22756440 is 4465722.

It is a super-2 number, since 2×22756440² = 1035711122947200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 22756398 and 22756407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22756441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12706 + ... + 14385.

It is an arithmetic number, because the mean of its divisors is an integer number (1219140).

Almost surely, 2^22756440 is an apocalyptic number.

22756440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22756440 is an abundant number, since it is smaller than the sum of its proper divisors (55268520).

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

22756440 is a wasteful number, since it uses less digits than its factorization.

22756440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27112 (or 27108 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 30.

The square root of 22756440 is about 4770.3710547504. The cubic root of 22756440 is about 283.3792897389.

The spelling of 22756440 in words is "twenty-two million, seven hundred fifty-six thousand, four hundred forty".