28539495 has 12 divisors (see below), whose sum is σ = 49468536. Its totient is φ = 15221040.

The previous prime is 28539479. The next prime is 28539503. The reversal of 28539495 is 59493582.

28539495 is a `hidden beast` number, since 28 + 539 + 4 + 95 = 666.

It is not a de Polignac number, because 28539495 - 2⁴ = 28539479 is a prime.

It is a super-3 number, since 3×28539495³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 634211 = 28539495 / (2 + 8 + 5 + 3 + 9 + 4 + 9 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 28539495.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 317061 + ... + 317150.

It is an arithmetic number, because the mean of its divisors is an integer number (4122378).

Almost surely, 2^28539495 is an apocalyptic number.

28539495 is a deficient number, since it is larger than the sum of its proper divisors (20929041).

28539495 is a wasteful number, since it uses less digits than its factorization.

28539495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 634222 (or 634219 counting only the distinct ones).

The product of its digits is 388800, while the sum is 45.

The square root of 28539495 is about 5342.2368910411. The cubic root of 28539495 is about 305.5967712018.

The spelling of 28539495 in words is "twenty-eight million, five hundred thirty-nine thousand, four hundred ninety-five".