22724457 has 32 divisors (see below), whose sum is σ = 36347904. Its totient is φ = 12355200.

The previous prime is 22724441. The next prime is 22724467. The reversal of 22724457 is 75442722.

It is a happy number.

22724457 is nontrivially palindromic in base 5.

It is not a de Polignac number, because 22724457 - 2⁴ = 22724441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22724417) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43357 + ... + 43877.

It is an arithmetic number, because the mean of its divisors is an integer number (1135872).

Almost surely, 2^22724457 is an apocalyptic number.

It is an amenable number.

22724457 is a deficient number, since it is larger than the sum of its proper divisors (13623447).

22724457 is a wasteful number, since it uses less digits than its factorization.

22724457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 629.

The product of its digits is 31360, while the sum is 33.

The square root of 22724457 is about 4767.0176211128. The cubic root of 22724457 is about 283.2464691813.

The spelling of 22724457 in words is "twenty-two million, seven hundred twenty-four thousand, four hundred fifty-seven".