22478288 has 20 divisors (see below), whose sum is σ = 49773600. Its totient is φ = 9633504.

The previous prime is 22478251. The next prime is 22478303. The reversal of 22478288 is 88287422.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100238 + ... + 100461.

It is an arithmetic number, because the mean of its divisors is an integer number (2488680).

Almost surely, 2^22478288 is an apocalyptic number.

22478288 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

22478288 is an abundant number, since it is smaller than the sum of its proper divisors (27295312).

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

22478288 is a wasteful number, since it uses less digits than its factorization.

22478288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200714 (or 200708 counting only the distinct ones).

The product of its digits is 114688, while the sum is 41.

The square root of 22478288 is about 4741.1272921110. The cubic root of 22478288 is about 282.2199715538.

The spelling of 22478288 in words is "twenty-two million, four hundred seventy-eight thousand, two hundred eighty-eight".