28020793 has 2 divisors, whose sum is σ = 28020794. Its totient is φ = 28020792.

The previous prime is 28020749. The next prime is 28020799. The reversal of 28020793 is 39702082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26656569 + 1364224 = 5163^2 + 1168^2 .

It is a cyclic number.

It is not a de Polignac number, because 28020793 - 2²¹ = 25923641 is a prime.

It is not a weakly prime, because it can be changed into another prime (28020799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14010396 + 14010397.

It is an arithmetic number, because the mean of its divisors is an integer number (14010397).

Almost surely, 2^28020793 is an apocalyptic number.

It is an amenable number.

28020793 is a deficient number, since it is larger than the sum of its proper divisors (1).

28020793 is an equidigital number, since it uses as much as digits as its factorization.

28020793 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 28020793 is about 5293.4670113263. The cubic root of 28020793 is about 303.7340450109.

It can be divided in two parts, 2802079 and 3, that added together give a palindrome (2802082).

The spelling of 28020793 in words is "twenty-eight million, twenty thousand, seven hundred ninety-three".