28371933 has 12 divisors (see below), whose sum is σ = 42089788. Its totient is φ = 18403200.

The previous prime is 28371923. The next prime is 28371971. The reversal of 28371933 is 33917382.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 21930489 + 6441444 = 4683^2 + 2538^2 .

It is not a de Polignac number, because 28371933 - 2⁵ = 28371901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28371923) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42268 + ... + 42933.

Almost surely, 2^28371933 is an apocalyptic number.

It is an amenable number.

28371933 is a deficient number, since it is larger than the sum of its proper divisors (13717855).

28371933 is a wasteful number, since it uses less digits than its factorization.

28371933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85244 (or 85241 counting only the distinct ones).

The product of its digits is 27216, while the sum is 36.

The square root of 28371933 is about 5326.5310475017. The cubic root of 28371933 is about 304.9975203597.

The spelling of 28371933 in words is "twenty-eight million, three hundred seventy-one thousand, nine hundred thirty-three".