22487749 has 8 divisors (see below), whose sum is σ = 23201280. Its totient is φ = 21779856.

The previous prime is 22487743. The next prime is 22487783. The reversal of 22487749 is 94778422.

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

It is a cyclic number.

It is not a de Polignac number, because 22487749 - 2²¹ = 20390597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22487743) 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, 7572 + ... + 10114.

It is an arithmetic number, because the mean of its divisors is an integer number (2900160).

Almost surely, 2^22487749 is an apocalyptic number.

It is an amenable number.

22487749 is a deficient number, since it is larger than the sum of its proper divisors (713531).

22487749 is a wasteful number, since it uses less digits than its factorization.

22487749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2819.

The product of its digits is 225792, while the sum is 43.

The square root of 22487749 is about 4742.1249456336. The cubic root of 22487749 is about 282.2595609957.

The spelling of 22487749 in words is "twenty-two million, four hundred eighty-seven thousand, seven hundred forty-nine".