22748257 has 8 divisors (see below), whose sum is σ = 26055296. Its totient is φ = 19455552.

The previous prime is 22748249. The next prime is 22748269. The reversal of 22748257 is 75284722.

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 22748257 - 2³ = 22748249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22748857) 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, 73 + ... + 6745.

It is an arithmetic number, because the mean of its divisors is an integer number (3256912).

Almost surely, 2^22748257 is an apocalyptic number.

It is an amenable number.

22748257 is a deficient number, since it is larger than the sum of its proper divisors (3307039).

22748257 is an equidigital number, since it uses as much as digits as its factorization.

22748257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7167.

The product of its digits is 62720, while the sum is 37.

The square root of 22748257 is about 4769.5132875378. The cubic root of 22748257 is about 283.3453188317.

It can be divided in two parts, 22748 and 257, that added together give a triangular number (23005 = T₂₁₄).

The spelling of 22748257 in words is "twenty-two million, seven hundred forty-eight thousand, two hundred fifty-seven".