28371433 has 4 divisors (see below), whose sum is σ = 28664020. Its totient is φ = 28078848.

The previous prime is 28371401. The next prime is 28371439. The reversal of 28371433 is 33417382.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5071504 + 23299929 = 2252^2 + 4827^2 .

It is a cyclic number.

It is not a de Polignac number, because 28371433 - 2⁵ = 28371401 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28371395 and 28371404.

It is not an unprimeable number, because it can be changed into a prime (28371439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146148 + ... + 146341.

It is an arithmetic number, because the mean of its divisors is an integer number (7166005).

Almost surely, 2^28371433 is an apocalyptic number.

It is an amenable number.

28371433 is a deficient number, since it is larger than the sum of its proper divisors (292587).

28371433 is an equidigital number, since it uses as much as digits as its factorization.

28371433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292586.

The product of its digits is 12096, while the sum is 31.

The square root of 28371433 is about 5326.4841124329. The cubic root of 28371433 is about 304.9957286869.

The spelling of 28371433 in words is "twenty-eight million, three hundred seventy-one thousand, four hundred thirty-three".