22724493 has 8 divisors (see below), whose sum is σ = 33053856. Its totient is φ = 13772400.

The previous prime is 22724479. The next prime is 22724497. The reversal of 22724493 is 39442722.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22724493 - 2¹⁰ = 22723469 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 688621 = 22724493 / (2 + 2 + 7 + 2 + 4 + 4 + 9 + 3).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22724497) 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, 344278 + ... + 344343.

It is an arithmetic number, because the mean of its divisors is an integer number (4131732).

Almost surely, 2^22724493 is an apocalyptic number.

It is an amenable number.

22724493 is a deficient number, since it is larger than the sum of its proper divisors (10329363).

22724493 is a wasteful number, since it uses less digits than its factorization.

22724493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688635.

The product of its digits is 24192, while the sum is 33.

The square root of 22724493 is about 4767.0213970571. The cubic root of 22724493 is about 283.2466187539.

The spelling of 22724493 in words is "twenty-two million, seven hundred twenty-four thousand, four hundred ninety-three".