22378272 has 48 divisors (see below), whose sum is σ = 67136832. Its totient is φ = 6393600.

The previous prime is 22378271. The next prime is 22378283. The reversal of 22378272 is 27287322.

It is a tau number, because it is divible by the number of its divisors (48).

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 (22378271) 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, 15979 + ... + 17322.

It is an arithmetic number, because the mean of its divisors is an integer number (1398684).

Almost surely, 2^22378272 is an apocalyptic number.

It is an amenable number.

22378272 is an abundant number, since it is smaller than the sum of its proper divisors (44758560).

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

22378272 is a wasteful number, since it uses less digits than its factorization.

22378272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33321 (or 33313 counting only the distinct ones).

The product of its digits is 18816, while the sum is 33.

The square root of 22378272 is about 4730.5678306098. The cubic root of 22378272 is about 281.8007747329.

The spelling of 22378272 in words is "twenty-two million, three hundred seventy-eight thousand, two hundred seventy-two".