22638384 has 30 divisors (see below), whose sum is σ = 63356436. Its totient is φ = 7546080.

The previous prime is 22638377. The next prime is 22638389. The reversal of 22638384 is 48383622.

It is a Harshad number since it is a multiple of its sum of digits (36).

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

It is not an unprimeable number, because it can be changed into a prime (22638389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 78462 + ... + 78749.

Almost surely, 2^22638384 is an apocalyptic number.

22638384 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

22638384 is an abundant number, since it is smaller than the sum of its proper divisors (40718052).

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

22638384 is a wasteful number, since it uses less digits than its factorization.

22638384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157225 (or 157216 counting only the distinct ones).

The product of its digits is 55296, while the sum is 36.

The square root of 22638384 is about 4757.9810844517. The cubic root of 22638384 is about 282.8884009358. Note that the first 3 decimals are identical.

The spelling of 22638384 in words is "twenty-two million, six hundred thirty-eight thousand, three hundred eighty-four".