22712280 has 64 divisors (see below), whose sum is σ = 69603840. Its totient is φ = 5926272.

The previous prime is 22712279. The next prime is 22712281. The reversal of 22712280 is 8221722.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (22712279) and next prime (22712281).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 22712280.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22712281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3627 + ... + 7653.

It is an arithmetic number, because the mean of its divisors is an integer number (1087560).

Almost surely, 2^22712280 is an apocalyptic number.

22712280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22712280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34801920).

22712280 is an abundant number, since it is smaller than the sum of its proper divisors (46891560).

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

22712280 is a wasteful number, since it uses less digits than its factorization.

22712280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4088 (or 4084 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 22712280 is about 4765.7402363117. The cubic root of 22712280 is about 283.1958671873.

The spelling of 22712280 in words is "twenty-two million, seven hundred twelve thousand, two hundred eighty".