28670077 has 2 divisors, whose sum is σ = 28670078. Its totient is φ = 28670076.

The previous prime is 28670063. The next prime is 28670087. The reversal of 28670077 is 77007682.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28665316 + 4761 = 5354^2 + 69^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28670077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28670087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14335038 + 14335039.

It is an arithmetic number, because the mean of its divisors is an integer number (14335039).

Almost surely, 2^28670077 is an apocalyptic number.

It is an amenable number.

28670077 is a deficient number, since it is larger than the sum of its proper divisors (1).

28670077 is an equidigital number, since it uses as much as digits as its factorization.

28670077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32928, while the sum is 37.

The square root of 28670077 is about 5354.4446023841. Note that the first 3 decimals coincide. The cubic root of 28670077 is about 306.0621465187.

The spelling of 28670077 in words is "twenty-eight million, six hundred seventy thousand, seventy-seven".