22528340 has 24 divisors (see below), whose sum is σ = 47423880. Its totient is φ = 8989568.

The previous prime is 22528321. The next prime is 22528361. The reversal of 22528340 is 4382522.

It can be written as a sum of positive squares in 4 ways, for example, as 12517444 + 10010896 = 3538^2 + 3164^2 .

It is a super-2 number, since 2×22528340² = 1015052206311200, which contains 22 as substring.

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, 9074 + ... + 11286.

It is an arithmetic number, because the mean of its divisors is an integer number (1975995).

Almost surely, 2^22528340 is an apocalyptic number.

22528340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22528340 is an abundant number, since it is smaller than the sum of its proper divisors (24895540).

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

22528340 is a wasteful number, since it uses less digits than its factorization.

22528340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2731 (or 2729 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 22528340 is about 4746.4028484738. The cubic root of 22528340 is about 282.4292876504.

The spelling of 22528340 in words is "twenty-two million, five hundred twenty-eight thousand, three hundred forty".