23036440 has 64 divisors (see below), whose sum is σ = 61300800. Its totient is φ = 7623168.

The previous prime is 23036437. The next prime is 23036473. The reversal of 23036440 is 4463032.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 6702 + ... + 9538.

It is an arithmetic number, because the mean of its divisors is an integer number (957825).

Almost surely, 2^23036440 is an apocalyptic number.

23036440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23036440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30650400).

23036440 is an abundant number, since it is smaller than the sum of its proper divisors (38264360).

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

23036440 is a wasteful number, since it uses less digits than its factorization.

23036440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2884 (or 2880 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 23036440 is about 4799.6291523408. The cubic root of 23036440 is about 284.5368078865.

Adding to 23036440 its reverse (4463032), we get a palindrome (27499472).

The spelling of 23036440 in words is "twenty-three million, thirty-six thousand, four hundred forty".