28303874 has 4 divisors (see below), whose sum is σ = 42455814. Its totient is φ = 14151936.

The previous prime is 28303871. The next prime is 28303879. The reversal of 28303874 is 47830382.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 47830382 = 2 ⋅23915191.

It can be written as a sum of positive squares in only one way, i.e., 19864849 + 8439025 = 4457^2 + 2905^2 .

It is a super-2 number, since 2×28303874² = 1602218566815752, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28303871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7075967 + ... + 7075970.

Almost surely, 2^28303874 is an apocalyptic number.

28303874 is a deficient number, since it is larger than the sum of its proper divisors (14151940).

28303874 is a wasteful number, since it uses less digits than its factorization.

28303874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14151939.

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 28303874 is about 5320.1385320309. The cubic root of 28303874 is about 304.7534476177.

The spelling of 28303874 in words is "twenty-eight million, three hundred three thousand, eight hundred seventy-four".