23409136 has 40 divisors (see below), whose sum is σ = 48612960. Its totient is φ = 10881024.

The previous prime is 23409131. The next prime is 23409137. The reversal of 23409136 is 63190432.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23409131) 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, 23725 + ... + 24691.

It is an arithmetic number, because the mean of its divisors is an integer number (1215324).

Almost surely, 2^23409136 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 23409136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24306480).

23409136 is an abundant number, since it is smaller than the sum of its proper divisors (25203824).

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

23409136 is a wasteful number, since it uses less digits than its factorization.

23409136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1081 (or 1075 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 23409136 is about 4838.2988746046. The cubic root of 23409136 is about 286.0630698599.

Adding to 23409136 its reverse (63190432), we get a palindrome (86599568).

It can be divided in two parts, 2340 and 9136, that added together give a triangular number (11476 = T₁₅₁).

The spelling of 23409136 in words is "twenty-three million, four hundred nine thousand, one hundred thirty-six".