23947830 has 72 divisors (see below), whose sum is σ = 65218608. Its totient is φ = 6096288.

The previous prime is 23947829. The next prime is 23947901. The reversal of 23947830 is 3874932.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 47359 + ... + 47861.

It is an arithmetic number, because the mean of its divisors is an integer number (905814).

Almost surely, 2^23947830 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23947830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32609304).

23947830 is an abundant number, since it is smaller than the sum of its proper divisors (41270778).

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

23947830 is a wasteful number, since it uses less digits than its factorization.

23947830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562 (or 536 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 23947830 is about 4893.6520105132. The cubic root of 23947830 is about 288.2407564358.

The spelling of 23947830 in words is "twenty-three million, nine hundred forty-seven thousand, eight hundred thirty".