23147856 has 100 divisors (see below), whose sum is σ = 68463252. Its totient is φ = 7547904.

The previous prime is 23147849. The next prime is 23147857. The reversal of 23147856 is 65874132.

It can be written as a sum of positive squares in 2 ways, for example, as 11451456 + 11696400 = 3384^2 + 3420^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 23147856.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23147857) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 68520 + ... + 68856.

Almost surely, 2^23147856 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 23147856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34231626).

23147856 is an abundant number, since it is smaller than the sum of its proper divisors (45315396).

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

23147856 is a wasteful number, since it uses less digits than its factorization.

23147856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410 (or 395 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 23147856 is about 4811.2218822249. The cubic root of 23147856 is about 284.9947921486.

The spelling of 23147856 in words is "twenty-three million, one hundred forty-seven thousand, eight hundred fifty-six".