28267685 has 8 divisors (see below), whose sum is σ = 35916696. Its totient is φ = 21283840.

The previous prime is 28267669. The next prime is 28267697. The reversal of 28267685 is 58676282.

It can be written as a sum of positive squares in 4 ways, for example, as 14145121 + 14122564 = 3761^2 + 3758^2 .

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

It is not a de Polignac number, because 28267685 - 2⁴ = 28267669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 166196 + ... + 166365.

It is an arithmetic number, because the mean of its divisors is an integer number (4489587).

Almost surely, 2^28267685 is an apocalyptic number.

It is an amenable number.

28267685 is a deficient number, since it is larger than the sum of its proper divisors (7649011).

28267685 is a wasteful number, since it uses less digits than its factorization.

28267685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332583.

The product of its digits is 322560, while the sum is 44.

The square root of 28267685 is about 5316.7363109336. The cubic root of 28267685 is about 304.6235074988.

The spelling of 28267685 in words is "twenty-eight million, two hundred sixty-seven thousand, six hundred eighty-five".