23907840 has 160 divisors (see below), whose sum is σ = 83673216. Its totient is φ = 5775360.

The previous prime is 23907827. The next prime is 23907841. The reversal of 23907840 is 4870932.

It is a tau number, because it is divible by the number of its divisors (160).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23907841) 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, 84339 + ... + 84621.

Almost surely, 2^23907840 is an apocalyptic number.

23907840 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 23907840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41836608).

23907840 is an abundant number, since it is smaller than the sum of its proper divisors (59765376).

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

23907840 is a wasteful number, since it uses less digits than its factorization.

23907840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320 (or 304 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 23907840 is about 4889.5643977761. The cubic root of 23907840 is about 288.0802245643.

The spelling of 23907840 in words is "twenty-three million, nine hundred seven thousand, eight hundred forty".