22738257 has 6 divisors (see below), whose sum is σ = 32844162. Its totient is φ = 15158832.

The previous prime is 22738229. The next prime is 22738273. The reversal of 22738257 is 75283722.

It is a happy number.

22738257 is a `hidden beast` number, since 227 + 382 + 57 = 666.

It can be written as a sum of positive squares in only one way, i.e., 19793601 + 2944656 = 4449^2 + 1716^2 .

It is not a de Polignac number, because 22738257 - 2¹⁰ = 22737233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22738297) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1263228 + ... + 1263245.

It is an arithmetic number, because the mean of its divisors is an integer number (5474027).

Almost surely, 2^22738257 is an apocalyptic number.

It is an amenable number.

22738257 is a deficient number, since it is larger than the sum of its proper divisors (10105905).

22738257 is a wasteful number, since it uses less digits than its factorization.

22738257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2526479 (or 2526476 counting only the distinct ones).

The product of its digits is 47040, while the sum is 36.

The square root of 22738257 is about 4768.4648473067. The cubic root of 22738257 is about 283.3037937678.

The spelling of 22738257 in words is "twenty-two million, seven hundred thirty-eight thousand, two hundred fifty-seven".