23961890 has 8 divisors (see below), whose sum is σ = 43131420. Its totient is φ = 9584752.

The previous prime is 23961863. The next prime is 23961919. The reversal of 23961890 is 9816932.

It can be written as a sum of positive squares in 2 ways, for example, as 19989841 + 3972049 = 4471^2 + 1993^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1198085 + ... + 1198104.

Almost surely, 2^23961890 is an apocalyptic number.

23961890 is a deficient number, since it is larger than the sum of its proper divisors (19169530).

23961890 is a wasteful number, since it uses less digits than its factorization.

23961890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2396196.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 23961890 is about 4895.0883546674. The cubic root of 23961890 is about 288.2971550347.

The spelling of 23961890 in words is "twenty-three million, nine hundred sixty-one thousand, eight hundred ninety".