22709772 has 18 divisors (see below), whose sum is σ = 57405348. Its totient is φ = 7569912.

The previous prime is 22709747. The next prime is 22709803. The reversal of 22709772 is 27790722.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 630827 = 22709772 / (2 + 2 + 7 + 0 + 9 + 7 + 7 + 2).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 315378 + ... + 315449.

It is an arithmetic number, because the mean of its divisors is an integer number (3189186).

Almost surely, 2^22709772 is an apocalyptic number.

It is an amenable number.

22709772 is an abundant number, since it is smaller than the sum of its proper divisors (34695576).

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

22709772 is a wasteful number, since it uses less digits than its factorization.

22709772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630837 (or 630832 counting only the distinct ones).

The product of its (nonzero) digits is 24696, while the sum is 36.

The square root of 22709772 is about 4765.4771009837. The cubic root of 22709772 is about 283.1854428503.

The spelling of 22709772 in words is "twenty-two million, seven hundred nine thousand, seven hundred seventy-two".