28840146 has 16 divisors (see below), whose sum is σ = 58252608. Its totient is φ = 9518000.

The previous prime is 28840127. The next prime is 28840153. The reversal of 28840146 is 64104882.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23190 + ... + 24401.

It is an arithmetic number, because the mean of its divisors is an integer number (3640788).

Almost surely, 2^28840146 is an apocalyptic number.

28840146 is an abundant number, since it is smaller than the sum of its proper divisors (29412462).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28840146 is a wasteful number, since it uses less digits than its factorization.

28840146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47697.

The product of its (nonzero) digits is 12288, while the sum is 33.

The square root of 28840146 is about 5370.3022261322. The cubic root of 28840146 is about 306.6661339520. Note that the first 3 decimals are identical.

The spelling of 28840146 in words is "twenty-eight million, eight hundred forty thousand, one hundred forty-six".