28951132 has 24 divisors (see below), whose sum is σ = 58060800. Its totient is φ = 12373680.

The previous prime is 28951129. The next prime is 28951157. The reversal of 28951132 is 23115982.

It is a junction number, because it is equal to n+sod(n) for n = 28951094 and 28951103.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10869 + ... + 13267.

It is an arithmetic number, because the mean of its divisors is an integer number (2419200).

Almost surely, 2^28951132 is an apocalyptic number.

It is an amenable number.

28951132 is an abundant number, since it is smaller than the sum of its proper divisors (29109668).

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

28951132 is a wasteful number, since it uses less digits than its factorization.

28951132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2841 (or 2839 counting only the distinct ones).

The product of its digits is 4320, while the sum is 31.

The square root of 28951132 is about 5380.6256141828. The cubic root of 28951132 is about 307.0590131544.

The spelling of 28951132 in words is "twenty-eight million, nine hundred fifty-one thousand, one hundred thirty-two".