22490749 has 4 divisors (see below), whose sum is σ = 22504000. Its totient is φ = 22477500.

The previous prime is 22490723. The next prime is 22490753. The reversal of 22490749 is 94709422.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22490749 - 2⁷ = 22490621 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 (22490249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3627 + ... + 7624.

It is an arithmetic number, because the mean of its divisors is an integer number (5626000).

Almost surely, 2^22490749 is an apocalyptic number.

It is an amenable number.

22490749 is a deficient number, since it is larger than the sum of its proper divisors (13251).

22490749 is a wasteful number, since it uses less digits than its factorization.

22490749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13250.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 22490749 is about 4742.4412489772. The cubic root of 22490749 is about 282.2721121413.

The spelling of 22490749 in words is "twenty-two million, four hundred ninety thousand, seven hundred forty-nine".