22496640 has 64 divisors (see below), whose sum is σ = 71714160. Its totient is φ = 5998592.

The previous prime is 22496581. The next prime is 22496647. The reversal of 22496640 is 4669422.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×22496640² = 1012197622579200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22496647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3939 + ... + 7778.

Almost surely, 2^22496640 is an apocalyptic number.

22496640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22496640 is an abundant number, since it is smaller than the sum of its proper divisors (49217520).

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

22496640 is a wasteful number, since it uses less digits than its factorization.

22496640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11739 (or 11727 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 22496640 is about 4743.0623019311. The cubic root of 22496640 is about 282.2967551600.

The spelling of 22496640 in words is "twenty-two million, four hundred ninety-six thousand, six hundred forty".