28263337 has 4 divisors (see below), whose sum is σ = 28650580. Its totient is φ = 27876096.

The previous prime is 28263311. The next prime is 28263349. The reversal of 28263337 is 73336282.

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 16353936 + 11909401 = 4044^2 + 3451^2 .

It is a cyclic number.

It is not a de Polignac number, because 28263337 - 2¹⁵ = 28230569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28263377) 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, 193512 + ... + 193657.

It is an arithmetic number, because the mean of its divisors is an integer number (7162645).

Almost surely, 2^28263337 is an apocalyptic number.

It is an amenable number.

28263337 is a deficient number, since it is larger than the sum of its proper divisors (387243).

28263337 is an equidigital number, since it uses as much as digits as its factorization.

28263337 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387242.

The product of its digits is 36288, while the sum is 34.

The square root of 28263337 is about 5316.3273977437. The cubic root of 28263337 is about 304.6078881213.

The spelling of 28263337 in words is "twenty-eight million, two hundred sixty-three thousand, three hundred thirty-seven".