28161208 has 8 divisors (see below), whose sum is σ = 52802280. Its totient is φ = 14080600.

The previous prime is 28161193. The next prime is 28161229. The reversal of 28161208 is 80216182.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1760068 + ... + 1760083.

It is an arithmetic number, because the mean of its divisors is an integer number (6600285).

Almost surely, 2^28161208 is an apocalyptic number.

It is an amenable number.

28161208 is a deficient number, since it is larger than the sum of its proper divisors (24641072).

28161208 is a wasteful number, since it uses less digits than its factorization.

28161208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3520157 (or 3520153 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 28161208 is about 5306.7134838806. The cubic root of 28161208 is about 304.2405471458.

The spelling of 28161208 in words is "twenty-eight million, one hundred sixty-one thousand, two hundred eight".