28347061 has 4 divisors (see below), whose sum is σ = 28378252. Its totient is φ = 28315872.

The previous prime is 28347047. The next prime is 28347083. The reversal of 28347061 is 16074382.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16074382 = 2 ⋅8037191.

It can be written as a sum of positive squares in 2 ways, for example, as 14516100 + 13830961 = 3810^2 + 3719^2 .

It is a cyclic number.

It is not a de Polignac number, because 28347061 - 2⁵ = 28347029 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 (28347001) 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, 14190 + ... + 16063.

It is an arithmetic number, because the mean of its divisors is an integer number (7094563).

Almost surely, 2^28347061 is an apocalyptic number.

It is an amenable number.

28347061 is a deficient number, since it is larger than the sum of its proper divisors (31191).

28347061 is an equidigital number, since it uses as much as digits as its factorization.

28347061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31190.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 28347061 is about 5324.1958078192. The cubic root of 28347061 is about 304.9083698588.

The spelling of 28347061 in words is "twenty-eight million, three hundred forty-seven thousand, sixty-one".