28161460 has 24 divisors (see below), whose sum is σ = 60399360. Its totient is φ = 11024544.

The previous prime is 28161421. The next prime is 28161473. The reversal of 28161460 is 6416182.

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, 14040 + ... + 15919.

It is an arithmetic number, because the mean of its divisors is an integer number (2516640).

Almost surely, 2^28161460 is an apocalyptic number.

28161460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28161460 is an abundant number, since it is smaller than the sum of its proper divisors (32237900).

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

28161460 is a wasteful number, since it uses less digits than its factorization.

28161460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30015 (or 30013 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 28161460 is about 5306.7372273366. The cubic root of 28161460 is about 304.2414546399.

The spelling of 28161460 in words is "twenty-eight million, one hundred sixty-one thousand, four hundred sixty".