28118766 has 16 divisors (see below), whose sum is σ = 60563664. Its totient is φ = 8651904.

The previous prime is 28118759. The next prime is 28118771. The reversal of 28118766 is 66781182.

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

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, 180171 + ... + 180326.

It is an arithmetic number, because the mean of its divisors is an integer number (3785229).

Almost surely, 2^28118766 is an apocalyptic number.

28118766 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

28118766 is an abundant number, since it is smaller than the sum of its proper divisors (32444898).

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

28118766 is a wasteful number, since it uses less digits than its factorization.

28118766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360515.

The product of its digits is 32256, while the sum is 39.

The square root of 28118766 is about 5302.7130791699. The cubic root of 28118766 is about 304.0876291126.

The spelling of 28118766 in words is "twenty-eight million, one hundred eighteen thousand, seven hundred sixty-six".