28075351 has 4 divisors (see below), whose sum is σ = 28121472. Its totient is φ = 28029232.

The previous prime is 28075343. The next prime is 28075357. The reversal of 28075351 is 15357082.

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 28075351 - 2³ = 28075343 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28075357) 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, 22135 + ... + 23368.

It is an arithmetic number, because the mean of its divisors is an integer number (7030368).

Almost surely, 2^28075351 is an apocalyptic number.

28075351 is a deficient number, since it is larger than the sum of its proper divisors (46121).

28075351 is an equidigital number, since it uses as much as digits as its factorization.

28075351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46120.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 28075351 is about 5298.6178386443. The cubic root of 28075351 is about 303.9310460818.

The spelling of 28075351 in words is "twenty-eight million, seventy-five thousand, three hundred fifty-one".