22752040 has 32 divisors (see below), whose sum is σ = 52579080. Its totient is φ = 8854272.

The previous prime is 22752019. The next prime is 22752071. The reversal of 22752040 is 4025722.

It can be written as a sum of positive squares in 4 ways, for example, as 16208676 + 6543364 = 4026^2 + 2558^2 .

It is a super-3 number, since 3×22752040³ (a number of 23 digits) contains 333 as substring.

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, 6207 + ... + 9166.

Almost surely, 2^22752040 is an apocalyptic number.

22752040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22752040 is an abundant number, since it is smaller than the sum of its proper divisors (29827040).

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

22752040 is a wasteful number, since it uses less digits than its factorization.

22752040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15421 (or 15417 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 22.

The square root of 22752040 is about 4769.9098523976. The cubic root of 22752040 is about 283.3610245907.

Adding to 22752040 its reverse (4025722), we get a palindrome (26777762).

The spelling of 22752040 in words is "twenty-two million, seven hundred fifty-two thousand, forty".