23140836 has 48 divisors (see below), whose sum is σ = 61626880. Its totient is φ = 7503840.

The previous prime is 23140823. The next prime is 23140853. The reversal of 23140836 is 63804132.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 1101 + ... + 6891.

Almost surely, 2^23140836 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 23140836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30813440).

23140836 is an abundant number, since it is smaller than the sum of its proper divisors (38486044).

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

23140836 is a wasteful number, since it uses less digits than its factorization.

23140836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5841 (or 5833 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 23140836 is about 4810.4922825008. The cubic root of 23140836 is about 284.9659793186.

Adding to 23140836 its reverse (63804132), we get a palindrome (86944968).

The spelling of 23140836 in words is "twenty-three million, one hundred forty thousand, eight hundred thirty-six".