23981400 has 96 divisors (see below), whose sum is σ = 82621200. Its totient is φ = 6393600.

The previous prime is 23981389. The next prime is 23981411. The reversal of 23981400 is 418932.

It is an interprime number because it is at equal distance from previous prime (23981389) and next prime (23981411).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3180 + ... + 7620.

Almost surely, 2^23981400 is an apocalyptic number.

23981400 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 23981400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41310600).

23981400 is an abundant number, since it is smaller than the sum of its proper divisors (58639800).

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

23981400 is a wasteful number, since it uses less digits than its factorization.

23981400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4466 (or 4451 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 23981400 is about 4897.0807630669. The cubic root of 23981400 is about 288.3753785754.

The spelling of 23981400 in words is "twenty-three million, nine hundred eighty-one thousand, four hundred".