23479281 has 24 divisors (see below), whose sum is σ = 40465440. Its totient is φ = 13415976.

The previous prime is 23479277. The next prime is 23479361. The reversal of 23479281 is 18297432.

It is not a de Polignac number, because 23479281 - 2² = 23479277 is a prime.

It is a super-2 number, since 2×23479281² = 1102553272553922, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (23479081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7551 + ... + 10196.

It is an arithmetic number, because the mean of its divisors is an integer number (1686060).

Almost surely, 2^23479281 is an apocalyptic number.

23479281 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

23479281 is a deficient number, since it is larger than the sum of its proper divisors (16986159).

23479281 is a wasteful number, since it uses less digits than its factorization.

23479281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17770 (or 17757 counting only the distinct ones).

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

The square root of 23479281 is about 4845.5423845015. The cubic root of 23479281 is about 286.3485123326.

It can be divided in two parts, 2347 and 9281, that added together give a triangular number (11628 = T₁₅₂).

The spelling of 23479281 in words is "twenty-three million, four hundred seventy-nine thousand, two hundred eighty-one".