23940987 has 16 divisors (see below), whose sum is σ = 36997632. Its totient is φ = 13487040.

The previous prime is 23940977. The next prime is 23940991. The reversal of 23940987 is 78904932.

It is not a de Polignac number, because 23940987 - 2¹⁵ = 23908219 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23940937) 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 15 ways as a sum of consecutive naturals, for example, 6538 + ... + 9519.

It is an arithmetic number, because the mean of its divisors is an integer number (2312352).

Almost surely, 2^23940987 is an apocalyptic number.

23940987 is a deficient number, since it is larger than the sum of its proper divisors (13056645).

23940987 is a wasteful number, since it uses less digits than its factorization.

23940987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16138.

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 23940987 is about 4892.9527894718. The cubic root of 23940987 is about 288.2132992592.

The spelling of 23940987 in words is "twenty-three million, nine hundred forty thousand, nine hundred eighty-seven".