22285720 has 32 divisors (see below), whose sum is σ = 50537520. Its totient is φ = 8844160.

The previous prime is 22285709. The next prime is 22285721. The reversal of 22285720 is 2758222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22285721) 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, 3114 + ... + 7366.

Almost surely, 2^22285720 is an apocalyptic number.

22285720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22285720 is an abundant number, since it is smaller than the sum of its proper divisors (28251800).

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

22285720 is a wasteful number, since it uses less digits than its factorization.

22285720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4395 (or 4391 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 22285720 is about 4720.7753600442. The cubic root of 22285720 is about 281.4117476191.

It can be divided in two parts, 22285 and 720, that added together give a triangular number (23005 = T₂₁₄).

The spelling of 22285720 in words is "twenty-two million, two hundred eighty-five thousand, seven hundred twenty".