22528742 has 8 divisors (see below), whose sum is σ = 33856536. Its totient is φ = 11243232.

The previous prime is 22528741. The next prime is 22528777. The reversal of 22528742 is 24782522.

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

It is a super-2 number, since 2×22528742² = 1015088432205128, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22528699 and 22528708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22528741) 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, 9203 + ... + 11390.

It is an arithmetic number, because the mean of its divisors is an integer number (4232067).

Almost surely, 2^22528742 is an apocalyptic number.

22528742 is a deficient number, since it is larger than the sum of its proper divisors (11327794).

22528742 is a wasteful number, since it uses less digits than its factorization.

22528742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21142.

The product of its digits is 17920, while the sum is 32.

The square root of 22528742 is about 4746.4451961442. The cubic root of 22528742 is about 282.4309675478.

The spelling of 22528742 in words is "twenty-two million, five hundred twenty-eight thousand, seven hundred forty-two".