22697220 has 96 divisors (see below), whose sum is σ = 78236928. Its totient is φ = 4787712.

The previous prime is 22697189. The next prime is 22697221. The reversal of 22697220 is 2279622.

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

It is not an unprimeable number, because it can be changed into a prime (22697221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3382 + ... + 7538.

It is an arithmetic number, because the mean of its divisors is an integer number (814968).

Almost surely, 2^22697220 is an apocalyptic number.

22697220 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 22697220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39118464).

22697220 is an abundant number, since it is smaller than the sum of its proper divisors (55539708).

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

22697220 is a wasteful number, since it uses less digits than its factorization.

22697220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4189 (or 4187 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 22697220 is about 4764.1599469371. The cubic root of 22697220 is about 283.1332597525.

The spelling of 22697220 in words is "twenty-two million, six hundred ninety-seven thousand, two hundred twenty".