28865433 has 16 divisors (see below), whose sum is σ = 39944192. Its totient is φ = 18522000.

The previous prime is 28865423. The next prime is 28865453. The reversal of 28865433 is 33456882.

It is not a de Polignac number, because 28865433 - 2⁵ = 28865401 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28865391 and 28865400.

It is not an unprimeable number, because it can be changed into a prime (28865423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18888 + ... + 20358.

It is an arithmetic number, because the mean of its divisors is an integer number (2496512).

Almost surely, 2^28865433 is an apocalyptic number.

It is an amenable number.

28865433 is a deficient number, since it is larger than the sum of its proper divisors (11078759).

28865433 is a wasteful number, since it uses less digits than its factorization.

28865433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1716.

The product of its digits is 138240, while the sum is 39.

The square root of 28865433 is about 5372.6560470590. The cubic root of 28865433 is about 306.7557359164.

The spelling of 28865433 in words is "twenty-eight million, eight hundred sixty-five thousand, four hundred thirty-three".