23828981 has 8 divisors (see below), whose sum is σ = 26892000. Its totient is φ = 20915440.

The previous prime is 23828971. The next prime is 23828993. The reversal of 23828981 is 18982832.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23828981 is a prime.

It is a super-2 number, since 2×23828981² = 1135640670996722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23828921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37031 + ... + 37668.

It is an arithmetic number, because the mean of its divisors is an integer number (3361500).

Almost surely, 2^23828981 is an apocalyptic number.

It is an amenable number.

23828981 is a deficient number, since it is larger than the sum of its proper divisors (3063019).

23828981 is a wasteful number, since it uses less digits than its factorization.

23828981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74739.

The product of its digits is 55296, while the sum is 41.

The square root of 23828981 is about 4881.4937263096. The cubic root of 23828981 is about 287.7631355242.

The spelling of 23828981 in words is "twenty-three million, eight hundred twenty-eight thousand, nine hundred eighty-one".