28333917 has 12 divisors (see below), whose sum is σ = 43334460. Its totient is φ = 17778048.

The previous prime is 28333901. The next prime is 28333933. The reversal of 28333917 is 71933382.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28333901) and next prime (28333933).

It can be written as a sum of positive squares in 2 ways, for example, as 26101881 + 2232036 = 5109^2 + 1494^2 .

It is not a de Polignac number, because 28333917 - 2⁴ = 28333901 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28333937) 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, 92442 + ... + 92747.

It is an arithmetic number, because the mean of its divisors is an integer number (3611205).

Almost surely, 2^28333917 is an apocalyptic number.

It is an amenable number.

28333917 is a deficient number, since it is larger than the sum of its proper divisors (15000543).

28333917 is a wasteful number, since it uses less digits than its factorization.

28333917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185212 (or 185209 counting only the distinct ones).

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

The square root of 28333917 is about 5322.9612998781. The cubic root of 28333917 is about 304.8612358108.

The spelling of 28333917 in words is "twenty-eight million, three hundred thirty-three thousand, nine hundred seventeen".