23978934 has 72 divisors (see below), whose sum is σ = 62457408. Its totient is φ = 6622560.

The previous prime is 23978921. The next prime is 23978953. The reversal of 23978934 is 43987932.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 23978934.

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, 26904 + ... + 27780.

It is an arithmetic number, because the mean of its divisors is an integer number (867464).

Almost surely, 2^23978934 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23978934, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31228704).

23978934 is an abundant number, since it is smaller than the sum of its proper divisors (38478474).

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

23978934 is a wasteful number, since it uses less digits than its factorization.

23978934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 930 (or 920 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The square root of 23978934 is about 4896.8289739381. The cubic root of 23978934 is about 288.3654937193.

The spelling of 23978934 in words is "twenty-three million, nine hundred seventy-eight thousand, nine hundred thirty-four".