23640077 has 8 divisors (see below), whose sum is σ = 24344472. Its totient is φ = 22939200.

The previous prime is 23640059. The next prime is 23640083. The reversal of 23640077 is 77004632.

It can be written as a sum of positive squares in 4 ways, for example, as 12524521 + 11115556 = 3539^2 + 3334^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23640077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23640037) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 19427 + ... + 20607.

It is an arithmetic number, because the mean of its divisors is an integer number (3043059).

Almost surely, 2^23640077 is an apocalyptic number.

It is an amenable number.

23640077 is a deficient number, since it is larger than the sum of its proper divisors (704395).

23640077 is a wasteful number, since it uses less digits than its factorization.

23640077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1759.

The product of its (nonzero) digits is 7056, while the sum is 29.

The square root of 23640077 is about 4862.1062308428. The cubic root of 23640077 is about 287.0007041467. Note that the first 3 decimals are identical.

The spelling of 23640077 in words is "twenty-three million, six hundred forty thousand, seventy-seven".