28156082 has 4 divisors (see below), whose sum is σ = 42234126. Its totient is φ = 14078040.

The previous prime is 28156067. The next prime is 28156123. The reversal of 28156082 is 28065182.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 28065182 = 2 ⋅14032591.

It can be written as a sum of positive squares in only one way, i.e., 25090081 + 3066001 = 5009^2 + 1751^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7039019 + ... + 7039022.

Almost surely, 2^28156082 is an apocalyptic number.

28156082 is a deficient number, since it is larger than the sum of its proper divisors (14078044).

28156082 is a wasteful number, since it uses less digits than its factorization.

28156082 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14078043.

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 28156082 is about 5306.2304887745. The cubic root of 28156082 is about 304.2220863885. Note that the first 3 decimals are identical.

The spelling of 28156082 in words is "twenty-eight million, one hundred fifty-six thousand, eighty-two".