23438987 has 8 divisors (see below), whose sum is σ = 27536880. Its totient is φ = 19668960.

The previous prime is 23438963. The next prime is 23439011. The reversal of 23438987 is 78983432.

It is an interprime number because it is at equal distance from previous prime (23438963) and next prime (23439011).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23438987 - 2⁶ = 23438923 is a prime.

It is a super-2 number, since 2×23438987² = 1098772223172338, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23438917) 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 7 ways as a sum of consecutive naturals, for example, 81812 + ... + 82097.

It is an arithmetic number, because the mean of its divisors is an integer number (3442110).

Almost surely, 2^23438987 is an apocalyptic number.

23438987 is a deficient number, since it is larger than the sum of its proper divisors (4097893).

23438987 is a wasteful number, since it uses less digits than its factorization.

23438987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163933.

The product of its digits is 290304, while the sum is 44.

The square root of 23438987 is about 4841.3827570230. The cubic root of 23438987 is about 286.1846127417.

The spelling of 23438987 in words is "twenty-three million, four hundred thirty-eight thousand, nine hundred eighty-seven".