22722987 has 8 divisors (see below), whose sum is σ = 34625536. Its totient is φ = 12984552.

The previous prime is 22722961. The next prime is 22722991. The reversal of 22722987 is 78922722.

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

It is not a de Polignac number, because 22722987 - 2⁶ = 22722923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22721987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 541003 + ... + 541044.

It is an arithmetic number, because the mean of its divisors is an integer number (4328192).

Almost surely, 2^22722987 is an apocalyptic number.

22722987 is a deficient number, since it is larger than the sum of its proper divisors (11902549).

22722987 is a wasteful number, since it uses less digits than its factorization.

22722987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1082057.

The product of its digits is 56448, while the sum is 39.

The square root of 22722987 is about 4766.8634341672. The cubic root of 22722987 is about 283.2403614990.

The spelling of 22722987 in words is "twenty-two million, seven hundred twenty-two thousand, nine hundred eighty-seven".