28012682 has 4 divisors (see below), whose sum is σ = 42019026. Its totient is φ = 14006340.

The previous prime is 28012681. The next prime is 28012693. The reversal of 28012682 is 28621082.

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

It can be written as a sum of positive squares in only one way, i.e., 25391521 + 2621161 = 5039^2 + 1619^2 .

It is not an unprimeable number, because it can be changed into a prime (28012681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7003169 + ... + 7003172.

Almost surely, 2^28012682 is an apocalyptic number.

28012682 is a deficient number, since it is larger than the sum of its proper divisors (14006344).

28012682 is a wasteful number, since it uses less digits than its factorization.

28012682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14006343.

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 28012682 is about 5292.7008228314. The cubic root of 28012682 is about 303.7047355313.

Subtracting 28012682 from its reverse (28621082), we obtain a square (608400 = 780²).

The spelling of 28012682 in words is "twenty-eight million, twelve thousand, six hundred eighty-two".