22038820 has 12 divisors (see below), whose sum is σ = 46281564. Its totient is φ = 8815520.

The previous prime is 22038781. The next prime is 22038829. The reversal of 22038820 is 2883022.

It can be written as a sum of positive squares in 2 ways, for example, as 8259876 + 13778944 = 2874^2 + 3712^2 .

It is not an unprimeable number, because it can be changed into a prime (22038829) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 550951 + ... + 550990.

It is an arithmetic number, because the mean of its divisors is an integer number (3856797).

Almost surely, 2^22038820 is an apocalyptic number.

22038820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22038820 is an abundant number, since it is smaller than the sum of its proper divisors (24242744).

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

22038820 is a wasteful number, since it uses less digits than its factorization.

22038820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1101950 (or 1101948 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 22038820 is about 4694.5521618148. The cubic root of 22038820 is about 280.3686470805.

The spelling of 22038820 in words is "twenty-two million, thirty-eight thousand, eight hundred twenty".