23990811 has 16 divisors (see below), whose sum is σ = 34538784. Its totient is φ = 14724864.

The previous prime is 23990809. The next prime is 23990819. The reversal of 23990811 is 11809932.

It is not a de Polignac number, because 23990811 - 2¹ = 23990809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23990819) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23565 + ... + 24561.

It is an arithmetic number, because the mean of its divisors is an integer number (2158674).

Almost surely, 2^23990811 is an apocalyptic number.

23990811 is a deficient number, since it is larger than the sum of its proper divisors (10547973).

23990811 is a wasteful number, since it uses less digits than its factorization.

23990811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1630.

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 23990811 is about 4898.0415473942. The cubic root of 23990811 is about 288.4130959419.

The spelling of 23990811 in words is "twenty-three million, nine hundred ninety thousand, eight hundred eleven".