23721984 has 240 divisors, whose sum is σ = 83243160. Its totient is φ = 6635520.

The previous prime is 23721979. The next prime is 23721991. The reversal of 23721984 is 48912732.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1824762 + ... + 1824774.

Almost surely, 2^23721984 is an apocalyptic number.

23721984 is a gapful number since it is divisible by the number (24) 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 23721984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41621580).

23721984 is an abundant number, since it is smaller than the sum of its proper divisors (59521176).

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

23721984 is a wasteful number, since it uses less digits than its factorization.

23721984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58 (or 29 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 23721984 is about 4870.5219432829. The cubic root of 23721984 is about 287.3317841420.

It can be divided in two parts, 2372 and 1984, that added together give a square (4356 = 66²).

The spelling of 23721984 in words is "twenty-three million, seven hundred twenty-one thousand, nine hundred eighty-four".