28396433 has 8 divisors (see below), whose sum is σ = 30777768. Its totient is φ = 26043264.

The previous prime is 28396399. The next prime is 28396439. The reversal of 28396433 is 33469382.

It can be written as a sum of positive squares in 4 ways, for example, as 760384 + 27636049 = 872^2 + 5257^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28396433 - 2⁶ = 28396369 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28396439) 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, 4916 + ... + 8997.

It is an arithmetic number, because the mean of its divisors is an integer number (3847221).

Almost surely, 2^28396433 is an apocalyptic number.

It is an amenable number.

28396433 is a deficient number, since it is larger than the sum of its proper divisors (2381335).

28396433 is a wasteful number, since it uses less digits than its factorization.

28396433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14083.

The product of its digits is 93312, while the sum is 38.

The square root of 28396433 is about 5328.8303594691. The cubic root of 28396433 is about 305.0852865497.

The spelling of 28396433 in words is "twenty-eight million, three hundred ninety-six thousand, four hundred thirty-three".