28989146 has 8 divisors (see below), whose sum is σ = 43507380. Its totient is φ = 14486688.

The previous prime is 28989143. The next prime is 28989157. The reversal of 28989146 is 64198982.

It can be written as a sum of positive squares in 2 ways, for example, as 27678121 + 1311025 = 5261^2 + 1145^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 28989146.

It is not an unprimeable number, because it can be changed into a prime (28989143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3350 + ... + 8318.

Almost surely, 2^28989146 is an apocalyptic number.

28989146 is a deficient number, since it is larger than the sum of its proper divisors (14518234).

28989146 is a wasteful number, since it uses less digits than its factorization.

28989146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7888.

The product of its digits is 248832, while the sum is 47.

The square root of 28989146 is about 5384.1569442207. The cubic root of 28989146 is about 307.1933479847.

The spelling of 28989146 in words is "twenty-eight million, nine hundred eighty-nine thousand, one hundred forty-six".