23189772 has 24 divisors (see below), whose sum is σ = 54918976. Its totient is φ = 7614288.

The previous prime is 23189759. The next prime is 23189797. The reversal of 23189772 is 27798132.

It is a self number, because there is not a number n which added to its sum of digits gives 23189772.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13618 + ... + 15225.

Almost surely, 2^23189772 is an apocalyptic number.

It is an amenable number.

23189772 is an abundant number, since it is smaller than the sum of its proper divisors (31729204).

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

23189772 is a wasteful number, since it uses less digits than its factorization.

23189772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28917 (or 28915 counting only the distinct ones).

The product of its digits is 42336, while the sum is 39.

The square root of 23189772 is about 4815.5759780114. The cubic root of 23189772 is about 285.1667107123.

It can be divided in two parts, 2318 and 9772, that added together give a triangular number (12090 = T₁₅₅).

The spelling of 23189772 in words is "twenty-three million, one hundred eighty-nine thousand, seven hundred seventy-two".