23172436 has 24 divisors (see below), whose sum is σ = 47108096. Its totient is φ = 9767520.

The previous prime is 23172389. The next prime is 23172437. The reversal of 23172436 is 63427132.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23172437) by changing a digit.

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, 5076 + ... + 8491.

Almost surely, 2^23172436 is an apocalyptic number.

It is an amenable number.

23172436 is an abundant number, since it is smaller than the sum of its proper divisors (23935660).

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

23172436 is a wasteful number, since it uses less digits than its factorization.

23172436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13639 (or 13637 counting only the distinct ones).

The product of its digits is 6048, while the sum is 28.

The square root of 23172436 is about 4813.7756491137. The cubic root of 23172436 is about 285.0956322138.

Adding to 23172436 its reverse (63427132), we get a palindrome (86599568).

It can be divided in two parts, 2317 and 2436, that added together give a triangular number (4753 = T₉₇).

The spelling of 23172436 in words is "twenty-three million, one hundred seventy-two thousand, four hundred thirty-six".