23628561 has 16 divisors (see below), whose sum is σ = 34480128. Its totient is φ = 14274000.

The previous prime is 23628559. The next prime is 23628581. The reversal of 23628561 is 16582632.

It is not a de Polignac number, because 23628561 - 2¹ = 23628559 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (23628581) 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, 11136 + ... + 13086.

It is an arithmetic number, because the mean of its divisors is an integer number (2155008).

Almost surely, 2^23628561 is an apocalyptic number.

It is an amenable number.

23628561 is a deficient number, since it is larger than the sum of its proper divisors (10851567).

23628561 is a wasteful number, since it uses less digits than its factorization.

23628561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2332.

The product of its digits is 17280, while the sum is 33.

The square root of 23628561 is about 4860.9218261560. The cubic root of 23628561 is about 286.9540935126.

The spelling of 23628561 in words is "twenty-three million, six hundred twenty-eight thousand, five hundred sixty-one".