22578428 has 6 divisors (see below), whose sum is σ = 39512256. Its totient is φ = 11289212.

The previous prime is 22578427. The next prime is 22578463. The reversal of 22578428 is 82487522.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 22578391 and 22578400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22578421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2822300 + ... + 2822307.

It is an arithmetic number, because the mean of its divisors is an integer number (6585376).

Almost surely, 2^22578428 is an apocalyptic number.

It is an amenable number.

22578428 is a deficient number, since it is larger than the sum of its proper divisors (16933828).

22578428 is a wasteful number, since it uses less digits than its factorization.

22578428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5644611 (or 5644609 counting only the distinct ones).

The product of its digits is 71680, while the sum is 38.

The square root of 22578428 is about 4751.6763357788. The cubic root of 22578428 is about 282.6384441632.

The spelling of 22578428 in words is "twenty-two million, five hundred seventy-eight thousand, four hundred twenty-eight".