22608749 has 4 divisors (see below), whose sum is σ = 22832700. Its totient is φ = 22384800.

The previous prime is 22608737. The next prime is 22608763. The reversal of 22608749 is 94780622.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10843849 + 11764900 = 3293^2 + 3430^2 .

It is a cyclic number.

It is not a de Polignac number, because 22608749 - 2⁸ = 22608493 is a prime.

It is a super-2 number, since 2×22608749² = 1022311062690002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22608769) 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, 111824 + ... + 112025.

It is an arithmetic number, because the mean of its divisors is an integer number (5708175).

Almost surely, 2^22608749 is an apocalyptic number.

It is an amenable number.

22608749 is a deficient number, since it is larger than the sum of its proper divisors (223951).

22608749 is a wasteful number, since it uses less digits than its factorization.

22608749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223950.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 22608749 is about 4754.8658235538. The cubic root of 22608749 is about 282.7649077491.

The spelling of 22608749 in words is "twenty-two million, six hundred eight thousand, seven hundred forty-nine".