28321136 has 10 divisors (see below), whose sum is σ = 54872232. Its totient is φ = 14160560.

The previous prime is 28321129. The next prime is 28321159. The reversal of 28321136 is 63112382.

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, 885020 + ... + 885051.

Almost surely, 2^28321136 is an apocalyptic number.

It is an amenable number.

28321136 is a deficient number, since it is larger than the sum of its proper divisors (26551096).

28321136 is a wasteful number, since it uses less digits than its factorization.

28321136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1770079 (or 1770073 counting only the distinct ones).

The product of its digits is 1728, while the sum is 26.

The square root of 28321136 is about 5321.7606109257. The cubic root of 28321136 is about 304.8153894908.

The spelling of 28321136 in words is "twenty-eight million, three hundred twenty-one thousand, one hundred thirty-six".