28084351 has 4 divisors (see below), whose sum is σ = 28101304. Its totient is φ = 28067400.

The previous prime is 28084349. The next prime is 28084361. The reversal of 28084351 is 15348082.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28084351 - 2¹ = 28084349 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 (28084361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5685 + ... + 9406.

It is an arithmetic number, because the mean of its divisors is an integer number (7025326).

Almost surely, 2^28084351 is an apocalyptic number.

28084351 is a deficient number, since it is larger than the sum of its proper divisors (16953).

28084351 is a wasteful number, since it uses less digits than its factorization.

28084351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16952.

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 28084351 is about 5299.4670486757. The cubic root of 28084351 is about 303.9635192547.

The spelling of 28084351 in words is "twenty-eight million, eighty-four thousand, three hundred fifty-one".