22748989 has 4 divisors (see below), whose sum is σ = 22805020. Its totient is φ = 22692960.

The previous prime is 22748983. The next prime is 22748993. The reversal of 22748989 is 98984722.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98984722 = 2 ⋅49492361.

It can be written as a sum of positive squares in 2 ways, for example, as 10791225 + 11957764 = 3285^2 + 3458^2 .

It is a cyclic number.

It is not a de Polignac number, because 22748989 - 2⁷ = 22748861 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 (22748983) 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, 27402 + ... + 28219.

It is an arithmetic number, because the mean of its divisors is an integer number (5701255).

Almost surely, 2^22748989 is an apocalyptic number.

It is an amenable number.

22748989 is a deficient number, since it is larger than the sum of its proper divisors (56031).

22748989 is an equidigital number, since it uses as much as digits as its factorization.

22748989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56030.

The product of its digits is 580608, while the sum is 49.

The square root of 22748989 is about 4769.5900243103. The cubic root of 22748989 is about 283.3483579883.

The spelling of 22748989 in words is "twenty-two million, seven hundred forty-eight thousand, nine hundred eighty-nine".