28890146 has 8 divisors (see below), whose sum is σ = 45616080. Its totient is φ = 13684788.

The previous prime is 28890143. The next prime is 28890167. The reversal of 28890146 is 64109882.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (38), and also a Moran number because the ratio is a prime number: 760267 = 28890146 / (2 + 8 + 8 + 9 + 0 + 1 + 4 + 6).

It is not an unprimeable number, because it can be changed into a prime (28890143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 380096 + ... + 380171.

It is an arithmetic number, because the mean of its divisors is an integer number (5702010).

Almost surely, 2^28890146 is an apocalyptic number.

28890146 is a deficient number, since it is larger than the sum of its proper divisors (16725934).

28890146 is a wasteful number, since it uses less digits than its factorization.

28890146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 760288.

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 28890146 is about 5374.9554416758. The cubic root of 28890146 is about 306.8432534221.

The spelling of 28890146 in words is "twenty-eight million, eight hundred ninety thousand, one hundred forty-six".