23781228 has 24 divisors (see below), whose sum is σ = 55801200. Its totient is φ = 7882560.

The previous prime is 23781227. The next prime is 23781229. The reversal of 23781228 is 82218732.

It is an interprime number because it is at equal distance from previous prime (23781227) and next prime (23781229).

It is not an unprimeable number, because it can be changed into a prime (23781221) 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, 3303 + ... + 7646.

It is an arithmetic number, because the mean of its divisors is an integer number (2325050).

Almost surely, 2^23781228 is an apocalyptic number.

It is an amenable number.

23781228 is an abundant number, since it is smaller than the sum of its proper divisors (32019972).

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

23781228 is a wasteful number, since it uses less digits than its factorization.

23781228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11137 (or 11135 counting only the distinct ones).

The product of its digits is 10752, while the sum is 33.

The square root of 23781228 is about 4876.6000451134. The cubic root of 23781228 is about 287.5707823200.

The spelling of 23781228 in words is "twenty-three million, seven hundred eighty-one thousand, two hundred twenty-eight".