22552740 has 108 divisors (see below), whose sum is σ = 79610076. Its totient is φ = 5152896.

The previous prime is 22552723. The next prime is 22552741. The reversal of 22552740 is 4725522.

It can be written as a sum of positive squares in 2 ways, for example, as 8892324 + 13660416 = 2982^2 + 3696^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22552741) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 7542 + ... + 10098.

Almost surely, 2^22552740 is an apocalyptic number.

22552740 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 22552740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39805038).

22552740 is an abundant number, since it is smaller than the sum of its proper divisors (57057336).

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

22552740 is a wasteful number, since it uses less digits than its factorization.

22552740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2586 (or 2574 counting only the distinct ones).

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

The square root of 22552740 is about 4748.9725204511. The cubic root of 22552740 is about 282.5312153880.

The spelling of 22552740 in words is "twenty-two million, five hundred fifty-two thousand, seven hundred forty".