22690820 has 12 divisors (see below), whose sum is σ = 47650764. Its totient is φ = 9076320.

The previous prime is 22690813. The next prime is 22690861. The reversal of 22690820 is 2809622.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 14760964 + 7929856 = 3842^2 + 2816^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 567251 + ... + 567290.

It is an arithmetic number, because the mean of its divisors is an integer number (3970897).

Almost surely, 2^22690820 is an apocalyptic number.

22690820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22690820 is an abundant number, since it is smaller than the sum of its proper divisors (24959944).

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

22690820 is a wasteful number, since it uses less digits than its factorization.

22690820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1134550 (or 1134548 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 22690820 is about 4763.4882176825. The cubic root of 22690820 is about 283.1066452860.

The spelling of 22690820 in words is "twenty-two million, six hundred ninety thousand, eight hundred twenty".