28947146 has 12 divisors (see below), whose sum is σ = 45827442. Its totient is φ = 13711464.

The previous prime is 28947143. The next prime is 28947151. The reversal of 28947146 is 64174982.

It can be written as a sum of positive squares in only one way, i.e., 28504921 + 442225 = 5339^2 + 665^2 .

It is not an unprimeable number, because it can be changed into a prime (28947143) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19325 + ... + 20768.

Almost surely, 2^28947146 is an apocalyptic number.

28947146 is a deficient number, since it is larger than the sum of its proper divisors (16880296).

28947146 is a wasteful number, since it uses less digits than its factorization.

28947146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40133 (or 40114 counting only the distinct ones).

The product of its digits is 96768, while the sum is 41.

The square root of 28947146 is about 5380.2551984083. The cubic root of 28947146 is about 307.0449205172.

The spelling of 28947146 in words is "twenty-eight million, nine hundred forty-seven thousand, one hundred forty-six".