28402793 has 2 divisors, whose sum is σ = 28402794. Its totient is φ = 28402792.

The previous prime is 28402771. The next prime is 28402807. The reversal of 28402793 is 39720482.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25928464 + 2474329 = 5092^2 + 1573^2 .

It is a cyclic number.

It is not a de Polignac number, because 28402793 - 2⁸ = 28402537 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28432793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14201396 + 14201397.

It is an arithmetic number, because the mean of its divisors is an integer number (14201397).

Almost surely, 2^28402793 is an apocalyptic number.

It is an amenable number.

28402793 is a deficient number, since it is larger than the sum of its proper divisors (1).

28402793 is an equidigital number, since it uses as much as digits as its factorization.

28402793 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 28402793 is about 5329.4270799027. The cubic root of 28402793 is about 305.1080616823.

The spelling of 28402793 in words is "twenty-eight million, four hundred two thousand, seven hundred ninety-three".