23840545 has 16 divisors (see below), whose sum is σ = 30602448. Its totient is φ = 17766400.

The previous prime is 23840527. The next prime is 23840587. The reversal of 23840545 is 54504832.

It can be written as a sum of positive squares in 8 ways, for example, as 762129 + 23078416 = 873^2 + 4804^2 .

It is not a de Polignac number, because 23840545 - 2⁷ = 23840417 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7197 + ... + 9973.

It is an arithmetic number, because the mean of its divisors is an integer number (1912653).

Almost surely, 2^23840545 is an apocalyptic number.

It is an amenable number.

23840545 is a deficient number, since it is larger than the sum of its proper divisors (6761903).

23840545 is a wasteful number, since it uses less digits than its factorization.

23840545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2900.

The product of its (nonzero) digits is 19200, while the sum is 31.

The square root of 23840545 is about 4882.6780561491. The cubic root of 23840545 is about 287.8096776563.

The spelling of 23840545 in words is "twenty-three million, eight hundred forty thousand, five hundred forty-five".