28815733 has 2 divisors, whose sum is σ = 28815734. Its totient is φ = 28815732.

The previous prime is 28815713. The next prime is 28815737. The reversal of 28815733 is 33751882.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28494244 + 321489 = 5338^2 + 567^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28815733 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28815692 and 28815701.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28815737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14407866 + 14407867.

It is an arithmetic number, because the mean of its divisors is an integer number (14407867).

Almost surely, 2^28815733 is an apocalyptic number.

It is an amenable number.

28815733 is a deficient number, since it is larger than the sum of its proper divisors (1).

28815733 is an equidigital number, since it uses as much as digits as its factorization.

28815733 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40320, while the sum is 37.

The square root of 28815733 is about 5368.0287815920. The cubic root of 28815733 is about 306.5795792147.

The spelling of 28815733 in words is "twenty-eight million, eight hundred fifteen thousand, seven hundred thirty-three".