23987481 has 32 divisors (see below), whose sum is σ = 39014400. Its totient is φ = 12804480.

The previous prime is 23987479. The next prime is 23987497. The reversal of 23987481 is 18478932.

It is not a de Polignac number, because 23987481 - 2¹ = 23987479 is a prime.

It is a super-2 number, since 2×23987481² = 1150798489450722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (23987461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31141 + ... + 31901.

It is an arithmetic number, because the mean of its divisors is an integer number (1219200).

Almost surely, 2^23987481 is an apocalyptic number.

23987481 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

23987481 is a deficient number, since it is larger than the sum of its proper divisors (15026919).

23987481 is a wasteful number, since it uses less digits than its factorization.

23987481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 869.

The product of its digits is 96768, while the sum is 42.

The square root of 23987481 is about 4897.7016038138. The cubic root of 23987481 is about 288.3997511096.

The spelling of 23987481 in words is "twenty-three million, nine hundred eighty-seven thousand, four hundred eighty-one".