23528557 has 8 divisors (see below), whose sum is σ = 25686584. Its totient is φ = 21420288.

The previous prime is 23528539. The next prime is 23528569. The reversal of 23528557 is 75582532.

It can be written as a sum of positive squares in 4 ways, for example, as 6380676 + 17147881 = 2526^2 + 4141^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 23528557 - 2¹¹ = 23526509 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 (23528537) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11448 + ... + 13345.

It is an arithmetic number, because the mean of its divisors is an integer number (3210823).

Almost surely, 2^23528557 is an apocalyptic number.

It is an amenable number.

23528557 is a deficient number, since it is larger than the sum of its proper divisors (2158027).

23528557 is a wasteful number, since it uses less digits than its factorization.

23528557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24879.

The product of its digits is 84000, while the sum is 37.

The square root of 23528557 is about 4850.6243927973. The cubic root of 23528557 is about 286.5486923667.

The spelling of 23528557 in words is "twenty-three million, five hundred twenty-eight thousand, five hundred fifty-seven".