28690853 has 8 divisors (see below), whose sum is σ = 29001336. Its totient is φ = 28382400.

The previous prime is 28690819. The next prime is 28690877. The reversal of 28690853 is 35809682.

It can be written as a sum of positive squares in 4 ways, for example, as 2137444 + 26553409 = 1462^2 + 5153^2 .

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 28690853 - 2⁶ = 28690789 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 28690853.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28690153) 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, 52763 + ... + 53303.

It is an arithmetic number, because the mean of its divisors is an integer number (3625167).

Almost surely, 2^28690853 is an apocalyptic number.

It is an amenable number.

28690853 is a deficient number, since it is larger than the sum of its proper divisors (310483).

28690853 is a wasteful number, since it uses less digits than its factorization.

28690853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1015.

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 28690853 is about 5356.3843215363. The cubic root of 28690853 is about 306.1360587932.

The spelling of 28690853 in words is "twenty-eight million, six hundred ninety thousand, eight hundred fifty-three".