22457520 has 160 divisors (see below), whose sum is σ = 79727040. Its totient is φ = 5806080.

The previous prime is 22457509. The next prime is 22457521. The reversal of 22457520 is 2575422.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22457521) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 79780 + ... + 80060.

It is an arithmetic number, because the mean of its divisors is an integer number (498294).

Almost surely, 2^22457520 is an apocalyptic number.

22457520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22457520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39863520).

22457520 is an abundant number, since it is smaller than the sum of its proper divisors (57269520).

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

22457520 is a wasteful number, since it uses less digits than its factorization.

22457520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340 (or 328 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 27.

The square root of 22457520 is about 4738.9365895737. The cubic root of 22457520 is about 282.1330291325.

The spelling of 22457520 in words is "twenty-two million, four hundred fifty-seven thousand, five hundred twenty".