22615428 has 24 divisors (see below), whose sum is σ = 57566880. Its totient is φ = 6853120.

The previous prime is 22615427. The next prime is 22615433. The reversal of 22615428 is 82451622.

It is a super-2 number, since 2×22615428² = 1022915167246368, which contains 22 as substring.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 22615395 and 22615404.

It is not an unprimeable number, because it can be changed into a prime (22615427) 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, 85533 + ... + 85796.

It is an arithmetic number, because the mean of its divisors is an integer number (2398620).

Almost surely, 2^22615428 is an apocalyptic number.

It is an amenable number.

22615428 is an abundant number, since it is smaller than the sum of its proper divisors (34951452).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22615428 is a wasteful number, since it uses less digits than its factorization.

22615428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171347 (or 171345 counting only the distinct ones).

The product of its digits is 7680, while the sum is 30.

The square root of 22615428 is about 4755.5681048640. The cubic root of 22615428 is about 282.7927494912.

The spelling of 22615428 in words is "twenty-two million, six hundred fifteen thousand, four hundred twenty-eight".