22628340 has 72 divisors (see below), whose sum is σ = 78449280. Its totient is φ = 5171904.

The previous prime is 22628327. The next prime is 22628383. The reversal of 22628340 is 4382622.

22628340 is a `hidden beast` number, since 2 + 2 + 628 + 34 + 0 = 666.

It is a super-3 number, since 3×22628340³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7720 + ... + 10239.

Almost surely, 2^22628340 is an apocalyptic number.

22628340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22628340 is an abundant number, since it is smaller than the sum of its proper divisors (55820940).

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

22628340 is a wasteful number, since it uses less digits than its factorization.

22628340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17981 (or 17976 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 22628340 is about 4756.9254776589. The cubic root of 22628340 is about 282.8465582641.

The spelling of 22628340 in words is "twenty-two million, six hundred twenty-eight thousand, three hundred forty".