28086432 has 48 divisors (see below), whose sum is σ = 80432352. Its totient is φ = 8510720.

The previous prime is 28086391. The next prime is 28086433. The reversal of 28086432 is 23468082.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 28086393 and 28086402.

It is not an unprimeable number, because it can be changed into a prime (28086433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12243 + ... + 14354.

It is an arithmetic number, because the mean of its divisors is an integer number (1675674).

Almost surely, 2^28086432 is an apocalyptic number.

28086432 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

28086432 is an abundant number, since it is smaller than the sum of its proper divisors (52345920).

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

28086432 is a wasteful number, since it uses less digits than its factorization.

28086432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26621 (or 26613 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 33.

The square root of 28086432 is about 5299.6633855369. The cubic root of 28086432 is about 303.9710267863.

The spelling of 28086432 in words is "twenty-eight million, eighty-six thousand, four hundred thirty-two".