28028029 has 2 divisors, whose sum is σ = 28028030. Its totient is φ = 28028028.

The previous prime is 28027991. The next prime is 28028057. The reversal of 28028029 is 92082082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26522500 + 1505529 = 5150^2 + 1227^2 .

It is a cyclic number.

It is not a de Polignac number, because 28028029 - 2¹³ = 28019837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28028069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14014014 + 14014015.

It is an arithmetic number, because the mean of its divisors is an integer number (14014015).

Almost surely, 2^28028029 is an apocalyptic number.

It is an amenable number.

28028029 is a deficient number, since it is larger than the sum of its proper divisors (1).

28028029 is an equidigital number, since it uses as much as digits as its factorization.

28028029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 28028029 is about 5294.1504512056. The cubic root of 28028029 is about 303.7601878636.

The spelling of 28028029 in words is "twenty-eight million, twenty-eight thousand, twenty-nine".