28167680 has 40 divisors (see below), whose sum is σ = 67542552. Its totient is φ = 11266048.

The previous prime is 28167679. The next prime is 28167731. The reversal of 28167680 is 8676182.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2942 + ... + 8061.

Almost surely, 2^28167680 is an apocalyptic number.

28167680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28167680 is an abundant number, since it is smaller than the sum of its proper divisors (39374872).

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

28167680 is an equidigital number, since it uses as much as digits as its factorization.

28167680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11026 (or 11010 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 28167680 is about 5307.3232424641. The cubic root of 28167680 is about 304.2638521830.

The spelling of 28167680 in words is "twenty-eight million, one hundred sixty-seven thousand, six hundred eighty".