22457500 has 60 divisors (see below), whose sum is σ = 52964296. Its totient is φ = 8280000.

The previous prime is 22457497. The next prime is 22457509. The reversal of 22457500 is 575422.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22457509) 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 19 ways as a sum of consecutive naturals, for example, 32155 + ... + 32845.

Almost surely, 2^22457500 is an apocalyptic number.

22457500 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 22457500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26482148).

22457500 is an abundant number, since it is smaller than the sum of its proper divisors (30506796).

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

22457500 is a wasteful number, since it uses less digits than its factorization.

22457500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 728 (or 711 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 25.

The square root of 22457500 is about 4738.9344793951. The cubic root of 22457500 is about 282.1329453794.

The spelling of 22457500 in words is "twenty-two million, four hundred fifty-seven thousand, five hundred".