28158160 has 40 divisors (see below), whose sum is σ = 65710080. Its totient is φ = 11221632.

The previous prime is 28158083. The next prime is 28158173. The reversal of 28158160 is 6185182.

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 polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30181 + ... + 31099.

It is an arithmetic number, because the mean of its divisors is an integer number (1642752).

Almost surely, 2^28158160 is an apocalyptic number.

28158160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

28158160 is the 3064-th octagonal number.

It is an amenable number.

28158160 is an abundant number, since it is smaller than the sum of its proper divisors (37551920).

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

28158160 is a wasteful number, since it uses less digits than its factorization.

28158160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1315 (or 1309 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 31.

The square root of 28158160 is about 5306.4262927134. The cubic root of 28158160 is about 304.2295703600.

The spelling of 28158160 in words is "twenty-eight million, one hundred fifty-eight thousand, one hundred sixty".