28081351 has 8 divisors (see below), whose sum is σ = 28998144. Its totient is φ = 27175680.

The previous prime is 28081337. The next prime is 28081387. The reversal of 28081351 is 15318082.

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 28081351 - 2⁷ = 28081223 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 (28081951) 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, 2511 + ... + 7903.

It is an arithmetic number, because the mean of its divisors is an integer number (3624768).

Almost surely, 2^28081351 is an apocalyptic number.

28081351 is a deficient number, since it is larger than the sum of its proper divisors (916793).

28081351 is a wasteful number, since it uses less digits than its factorization.

28081351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5561.

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 28081351 is about 5299.1839937862. The cubic root of 28081351 is about 303.9526956347.

The spelling of 28081351 in words is "twenty-eight million, eighty-one thousand, three hundred fifty-one".