28598077 has 4 divisors (see below), whose sum is σ = 29371036. Its totient is φ = 27825120.

The previous prime is 28598071. The next prime is 28598083. The reversal of 28598077 is 77089582.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 77089582 = 2 ⋅38544791.

It is an interprime number because it is at equal distance from previous prime (28598071) and next prime (28598083).

It can be written as a sum of positive squares in 2 ways, for example, as 17214201 + 11383876 = 4149^2 + 3374^2 .

It is a cyclic number.

It is not a de Polignac number, because 28598077 - 2¹⁵ = 28565309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28598071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 386424 + ... + 386497.

It is an arithmetic number, because the mean of its divisors is an integer number (7342759).

Almost surely, 2^28598077 is an apocalyptic number.

It is an amenable number.

28598077 is a deficient number, since it is larger than the sum of its proper divisors (772959).

28598077 is an equidigital number, since it uses as much as digits as its factorization.

28598077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 772958.

The product of its (nonzero) digits is 282240, while the sum is 46.

The square root of 28598077 is about 5347.7169895199. The cubic root of 28598077 is about 305.8057241487.

The spelling of 28598077 in words is "twenty-eight million, five hundred ninety-eight thousand, seventy-seven".