23490287 has 4 divisors (see below), whose sum is σ = 23500680. Its totient is φ = 23479896.

The previous prime is 23490241. The next prime is 23490329. The reversal of 23490287 is 78209432.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 23490287 - 2¹⁸ = 23228143 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23490217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 212 + ... + 6857.

It is an arithmetic number, because the mean of its divisors is an integer number (5875170).

Almost surely, 2^23490287 is an apocalyptic number.

23490287 is a deficient number, since it is larger than the sum of its proper divisors (10393).

23490287 is an equidigital number, since it uses as much as digits as its factorization.

23490287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10392.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 23490287 is about 4846.6779344206. The cubic root of 23490287 is about 286.3932476522.

The spelling of 23490287 in words is "twenty-three million, four hundred ninety thousand, two hundred eighty-seven".