23440487 has 4 divisors (see below), whose sum is σ = 26789136. Its totient is φ = 20091840.

The previous prime is 23440481. The next prime is 23440489. The reversal of 23440487 is 78404432.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 23440487 - 2⁶ = 23440423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23440481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1674314 + ... + 1674327.

It is an arithmetic number, because the mean of its divisors is an integer number (6697284).

Almost surely, 2^23440487 is an apocalyptic number.

23440487 is a deficient number, since it is larger than the sum of its proper divisors (3348649).

23440487 is an equidigital number, since it uses as much as digits as its factorization.

23440487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3348648.

The product of its (nonzero) digits is 21504, while the sum is 32.

The square root of 23440487 is about 4841.5376689643. The cubic root of 23440487 is about 286.1907174959.

The spelling of 23440487 in words is "twenty-three million, four hundred forty thousand, four hundred eighty-seven".