22628820 has 24 divisors (see below), whose sum is σ = 63360864. Its totient is φ = 6034336.

The previous prime is 22628813. The next prime is 22628821. The reversal of 22628820 is 2882622.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22628821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 188514 + ... + 188633.

It is an arithmetic number, because the mean of its divisors is an integer number (2640036).

Almost surely, 2^22628820 is an apocalyptic number.

22628820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22628820 is an abundant number, since it is smaller than the sum of its proper divisors (40732044).

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

22628820 is a wasteful number, since it uses less digits than its factorization.

22628820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377159 (or 377157 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 30.

The square root of 22628820 is about 4756.9759301472. The cubic root of 22628820 is about 282.8485581956.

The spelling of 22628820 in words is "twenty-two million, six hundred twenty-eight thousand, eight hundred twenty".