23920649 has 16 divisors (see below), whose sum is σ = 26127360. Its totient is φ = 21815040.

The previous prime is 23920643. The next prime is 23920661. The reversal of 23920649 is 94602932.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23920649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23920643) 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, 125144 + ... + 125334.

It is an arithmetic number, because the mean of its divisors is an integer number (1632960).

Almost surely, 2^23920649 is an apocalyptic number.

It is an amenable number.

23920649 is a deficient number, since it is larger than the sum of its proper divisors (2206711).

23920649 is a wasteful number, since it uses less digits than its factorization.

23920649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 23920649 is about 4890.8740527640. The cubic root of 23920649 is about 288.1316632109.

The spelling of 23920649 in words is "twenty-three million, nine hundred twenty thousand, six hundred forty-nine".