22722870 has 16 divisors (see below), whose sum is σ = 54534960. Its totient is φ = 6059424.

The previous prime is 22722851. The next prime is 22722883. The reversal of 22722870 is 7822722.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 757429 = 22722870 / (2 + 2 + 7 + 2 + 2 + 8 + 7 + 0).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 378685 + ... + 378744.

It is an arithmetic number, because the mean of its divisors is an integer number (3408435).

Almost surely, 2^22722870 is an apocalyptic number.

22722870 is an abundant number, since it is smaller than the sum of its proper divisors (31812090).

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

22722870 is a wasteful number, since it uses less digits than its factorization.

22722870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 757439.

The product of its (nonzero) digits is 6272, while the sum is 30.

The square root of 22722870 is about 4766.8511619307. The cubic root of 22722870 is about 283.2398753661.

The spelling of 22722870 in words is "twenty-two million, seven hundred twenty-two thousand, eight hundred seventy".