22720870 has 8 divisors (see below), whose sum is σ = 40897584. Its totient is φ = 9088344.

The previous prime is 22720843. The next prime is 22720889. The reversal of 22720870 is 7802722.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1136034 + ... + 1136053.

It is an arithmetic number, because the mean of its divisors is an integer number (5112198).

Almost surely, 2^22720870 is an apocalyptic number.

22720870 is a deficient number, since it is larger than the sum of its proper divisors (18176714).

22720870 is a wasteful number, since it uses less digits than its factorization.

22720870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2272094.

The product of its (nonzero) digits is 3136, while the sum is 28.

The square root of 22720870 is about 4766.6413752243. The cubic root of 22720870 is about 283.2315651427.

The spelling of 22720870 in words is "twenty-two million, seven hundred twenty thousand, eight hundred seventy".