28985166 has 72 divisors (see below), whose sum is σ = 74426040. Its totient is φ = 8126496.

The previous prime is 28985147. The next prime is 28985167. The reversal of 28985166 is 66158982.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28985167) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 51760 + ... + 52316.

It is an arithmetic number, because the mean of its divisors is an integer number (1033695).

Almost surely, 2^28985166 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28985166, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37213020).

28985166 is an abundant number, since it is smaller than the sum of its proper divisors (45440874).

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

28985166 is a wasteful number, since it uses less digits than its factorization.

28985166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 638 (or 628 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The square root of 28985166 is about 5383.7873286377. The cubic root of 28985166 is about 307.1792888666.

The spelling of 28985166 in words is "twenty-eight million, nine hundred eighty-five thousand, one hundred sixty-six".