22678272 has 144 divisors (see below), whose sum is σ = 71376480. Its totient is φ = 7077888.

The previous prime is 22678259. The next prime is 22678273. The reversal of 22678272 is 27287622.

It is a tau number, because it is divible by the number of its divisors (144).

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

It is not an unprimeable number, because it can be changed into a prime (22678273) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117408 + ... + 117600.

It is an arithmetic number, because the mean of its divisors is an integer number (495670).

Almost surely, 2^22678272 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22678272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35688240).

22678272 is an abundant number, since it is smaller than the sum of its proper divisors (48698208).

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

22678272 is a wasteful number, since it uses less digits than its factorization.

22678272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235 (or 215 counting only the distinct ones).

The product of its digits is 37632, while the sum is 36.

The square root of 22678272 is about 4762.1709335134. The cubic root of 22678272 is about 283.0544497694.

The spelling of 22678272 in words is "twenty-two million, six hundred seventy-eight thousand, two hundred seventy-two".