23840528 has 20 divisors (see below), whose sum is σ = 48908700. Its totient is φ = 11218944.

The previous prime is 23840527. The next prime is 23840587. The reversal of 23840528 is 82504832.

It can be written as a sum of positive squares in 2 ways, for example, as 13778944 + 10061584 = 3712^2 + 3172^2 .

It is a junction number, because it is equal to n+sod(n) for n = 23840494 and 23840503.

It is not an unprimeable number, because it can be changed into a prime (23840521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43553 + ... + 44096.

It is an arithmetic number, because the mean of its divisors is an integer number (2445435).

Almost surely, 2^23840528 is an apocalyptic number.

It is an amenable number.

23840528 is an abundant number, since it is smaller than the sum of its proper divisors (25068172).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23840528 is a wasteful number, since it uses less digits than its factorization.

23840528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87674 (or 87668 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 32.

The square root of 23840528 is about 4882.6763153009. The cubic root of 23840528 is about 287.8096092467.

The spelling of 23840528 in words is "twenty-three million, eight hundred forty thousand, five hundred twenty-eight".