28570733 has 2 divisors, whose sum is σ = 28570734. Its totient is φ = 28570732.

The previous prime is 28570673. The next prime is 28570739. The reversal of 28570733 is 33707582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16826404 + 11744329 = 4102^2 + 3427^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28570733 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28570693 and 28570702.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28570739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14285366 + 14285367.

It is an arithmetic number, because the mean of its divisors is an integer number (14285367).

Almost surely, 2^28570733 is an apocalyptic number.

It is an amenable number.

28570733 is a deficient number, since it is larger than the sum of its proper divisors (1).

28570733 is an equidigital number, since it uses as much as digits as its factorization.

28570733 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35280, while the sum is 35.

The square root of 28570733 is about 5345.1597731031. The cubic root of 28570733 is about 305.7082278703.

The spelling of 28570733 in words is "twenty-eight million, five hundred seventy thousand, seven hundred thirty-three".