22057440 has 48 divisors (see below), whose sum is σ = 69482448. Its totient is φ = 5881856.

The previous prime is 22057433. The next prime is 22057457. The reversal of 22057440 is 4475022.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 22057440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22497 + ... + 23456.

It is an arithmetic number, because the mean of its divisors is an integer number (1447551).

Almost surely, 2^22057440 is an apocalyptic number.

22057440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22057440 is an abundant number, since it is smaller than the sum of its proper divisors (47425008).

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

22057440 is a wasteful number, since it uses less digits than its factorization.

22057440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45971 (or 45963 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 24.

The square root of 22057440 is about 4696.5348928758. The cubic root of 22057440 is about 280.4475834708.

The spelling of 22057440 in words is "twenty-two million, fifty-seven thousand, four hundred forty".