28166736 has 40 divisors (see below), whose sum is σ = 78363040. Its totient is φ = 8666496.

The previous prime is 28166729. The next prime is 28166741. The reversal of 28166736 is 63766182.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 28166694 and 28166703.

It is a congruent 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, 21946 + ... + 23193.

It is an arithmetic number, because the mean of its divisors is an integer number (1959076).

Almost surely, 2^28166736 is an apocalyptic number.

28166736 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

28166736 is an abundant number, since it is smaller than the sum of its proper divisors (50196304).

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

28166736 is a wasteful number, since it uses less digits than its factorization.

28166736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45163 (or 45157 counting only the distinct ones).

The product of its digits is 72576, while the sum is 39.

The square root of 28166736 is about 5307.2343079988. The cubic root of 28166736 is about 304.2604531540.

The spelling of 28166736 in words is "twenty-eight million, one hundred sixty-six thousand, seven hundred thirty-six".