28567539 has 96 divisors (see below), whose sum is σ = 58222080. Its totient is φ = 13608000.

The previous prime is 28567537. The next prime is 28567559. The reversal of 28567539 is 93576582.

It is a happy number.

It is not a de Polignac number, because 28567539 - 2¹ = 28567537 is a prime.

It is a super-2 number, since 2×28567539² = 1632208569033042, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28567494 and 28567503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28567537) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 189114 + ... + 189264.

It is an arithmetic number, because the mean of its divisors is an integer number (606480).

Almost surely, 2^28567539 is an apocalyptic number.

28567539 is an abundant number, since it is smaller than the sum of its proper divisors (29654541).

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

28567539 is a wasteful number, since it uses less digits than its factorization.

28567539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198 (or 185 counting only the distinct ones).

The product of its digits is 453600, while the sum is 45.

The square root of 28567539 is about 5344.8609897733. The cubic root of 28567539 is about 305.6968354609.

The spelling of 28567539 in words is "twenty-eight million, five hundred sixty-seven thousand, five hundred thirty-nine".