28161832 has 8 divisors (see below), whose sum is σ = 52803450. Its totient is φ = 14080912.

The previous prime is 28161827. The next prime is 28161839. The reversal of 28161832 is 23816182.

It can be written as a sum of positive squares in only one way, i.e., 15729156 + 12432676 = 3966^2 + 3526^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 28161794 and 28161803.

It is not an unprimeable number, because it can be changed into a prime (28161839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1760107 + ... + 1760122.

Almost surely, 2^28161832 is an apocalyptic number.

It is an amenable number.

28161832 is a deficient number, since it is larger than the sum of its proper divisors (24641618).

28161832 is a wasteful number, since it uses less digits than its factorization.

28161832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3520235 (or 3520231 counting only the distinct ones).

The product of its digits is 4608, while the sum is 31.

The square root of 28161832 is about 5306.7722770061. The cubic root of 28161832 is about 304.2427942642.

The spelling of 28161832 in words is "twenty-eight million, one hundred sixty-one thousand, eight hundred thirty-two".