28347146 has 4 divisors (see below), whose sum is σ = 42520722. Its totient is φ = 14173572.

The previous prime is 28347139. The next prime is 28347173. The reversal of 28347146 is 64174382.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64174382 = 2 ⋅32087191.

It can be written as a sum of positive squares in only one way, i.e., 25897921 + 2449225 = 5089^2 + 1565^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7086785 + ... + 7086788.

Almost surely, 2^28347146 is an apocalyptic number.

28347146 is a deficient number, since it is larger than the sum of its proper divisors (14173576).

28347146 is a wasteful number, since it uses less digits than its factorization.

28347146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14173575.

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

The square root of 28347146 is about 5324.2037902394. The cubic root of 28347146 is about 304.9086746192.

The spelling of 28347146 in words is "twenty-eight million, three hundred forty-seven thousand, one hundred forty-six".