22259440 has 40 divisors (see below), whose sum is σ = 59148000. Its totient is φ = 7631616.

The previous prime is 22259429. The next prime is 22259513. The reversal of 22259440 is 4495222.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×22259440² = 990965338227200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 22259399 and 22259408.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 19315 + ... + 20434.

It is an arithmetic number, because the mean of its divisors is an integer number (1478700).

Almost surely, 2^22259440 is an apocalyptic number.

22259440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22259440 is an abundant number, since it is smaller than the sum of its proper divisors (36888560).

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

22259440 is a wasteful number, since it uses less digits than its factorization.

22259440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39769 (or 39763 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 22259440 is about 4717.9910979145. The cubic root of 22259440 is about 281.3010876743.

The spelling of 22259440 in words is "twenty-two million, two hundred fifty-nine thousand, four hundred forty".