23721880 has 160 divisors (see below), whose sum is σ = 70585200. Its totient is φ = 7112448.

The previous prime is 23721869. The next prime is 23721889. The reversal of 23721880 is 8812732.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23721889) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1248511 + ... + 1248529.

Almost surely, 2^23721880 is an apocalyptic number.

23721880 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 23721880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35292600).

23721880 is an abundant number, since it is smaller than the sum of its proper divisors (46863320).

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

23721880 is a wasteful number, since it uses less digits than its factorization.

23721880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71 (or 46 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 23721880 is about 4870.5112667974. The cubic root of 23721880 is about 287.3313642425.

The spelling of 23721880 in words is "twenty-three million, seven hundred twenty-one thousand, eight hundred eighty".