28762813 has 2 divisors, whose sum is σ = 28762814. Its totient is φ = 28762812.

The previous prime is 28762757. The next prime is 28762819. The reversal of 28762813 is 31826782.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26030404 + 2732409 = 5102^2 + 1653^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28762813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28762819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14381406 + 14381407.

It is an arithmetic number, because the mean of its divisors is an integer number (14381407).

Almost surely, 2^28762813 is an apocalyptic number.

It is an amenable number.

28762813 is a deficient number, since it is larger than the sum of its proper divisors (1).

28762813 is an equidigital number, since it uses as much as digits as its factorization.

28762813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32256, while the sum is 37.

The square root of 28762813 is about 5363.0973326987. The cubic root of 28762813 is about 306.3917867407.

The spelling of 28762813 in words is "twenty-eight million, seven hundred sixty-two thousand, eight hundred thirteen".