28700166 has 32 divisors (see below), whose sum is σ = 63278208. Its totient is φ = 8605440.

The previous prime is 28700153. The next prime is 28700171. The reversal of 28700166 is 66100782.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4161 + ... + 8643.

It is an arithmetic number, because the mean of its divisors is an integer number (1977444).

Almost surely, 2^28700166 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28700166, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31639104).

28700166 is an abundant number, since it is smaller than the sum of its proper divisors (34578042).

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

28700166 is a wasteful number, since it uses less digits than its factorization.

28700166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4596.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 28700166 is about 5357.2535874271. The cubic root of 28700166 is about 306.1691789504.

The spelling of 28700166 in words is "twenty-eight million, seven hundred thousand, one hundred sixty-six".