28670146 has 4 divisors (see below), whose sum is σ = 43005222. Its totient is φ = 14335072.

The previous prime is 28670101. The next prime is 28670179. The reversal of 28670146 is 64107682.

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., 25897921 + 2772225 = 5089^2 + 1665^2 .

It is a super-2 number, since 2×28670146² = 1643954543322632, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7167535 + ... + 7167538.

Almost surely, 2^28670146 is an apocalyptic number.

28670146 is a deficient number, since it is larger than the sum of its proper divisors (14335076).

28670146 is a wasteful number, since it uses less digits than its factorization.

28670146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14335075.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 28670146 is about 5354.4510456255. The cubic root of 28670146 is about 306.0623920508.

The spelling of 28670146 in words is "twenty-eight million, six hundred seventy thousand, one hundred forty-six".