23951840 has 96 divisors (see below), whose sum is σ = 63866880. Its totient is φ = 8409600.

The previous prime is 23951821. The next prime is 23951849. The reversal of 23951840 is 4815932.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 23951797 and 23951806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23951849) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54341 + ... + 54779.

It is an arithmetic number, because the mean of its divisors is an integer number (665280).

Almost surely, 2^23951840 is an apocalyptic number.

23951840 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 23951840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31933440).

23951840 is an abundant number, since it is smaller than the sum of its proper divisors (39915040).

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

23951840 is a wasteful number, since it uses less digits than its factorization.

23951840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496 (or 488 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 23951840 is about 4894.0617078251. The cubic root of 23951840 is about 288.2568439188.

The spelling of 23951840 in words is "twenty-three million, nine hundred fifty-one thousand, eight hundred forty".