23428881 has 72 divisors (see below), whose sum is σ = 43709120. Its totient is φ = 11803968.

The previous prime is 23428861. The next prime is 23428883. The reversal of 23428881 is 18882432.

It is a happy number.

It is not a de Polignac number, because 23428881 - 2⁶ = 23428817 is a prime.

It is a super-2 number, since 2×23428881² = 1097824929824322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23428883) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 633195 + ... + 633231.

Almost surely, 2^23428881 is an apocalyptic number.

23428881 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

23428881 is a deficient number, since it is larger than the sum of its proper divisors (20280239).

23428881 is a wasteful number, since it uses less digits than its factorization.

23428881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115 (or 89 counting only the distinct ones).

The product of its digits is 24576, while the sum is 36.

The square root of 23428881 is about 4840.3389344136. The cubic root of 23428881 is about 286.1434761877.

The spelling of 23428881 in words is "twenty-three million, four hundred twenty-eight thousand, eight hundred eighty-one".