28313077 has 24 divisors (see below), whose sum is σ = 32610600. Its totient is φ = 24530688.

The previous prime is 28313063. The next prime is 28313081. The reversal of 28313077 is 77031382.

It can be written as a sum of positive squares in 12 ways, for example, as 7873636 + 20439441 = 2806^2 + 4521^2 .

It is not a de Polignac number, because 28313077 - 2²³ = 19924469 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 (28313017) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 259699 + ... + 259807.

It is an arithmetic number, because the mean of its divisors is an integer number (1358775).

Almost surely, 2^28313077 is an apocalyptic number.

It is an amenable number.

28313077 is a deficient number, since it is larger than the sum of its proper divisors (4297523).

28313077 is a wasteful number, since it uses less digits than its factorization.

28313077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217 (or 204 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 28313077 is about 5321.0033828217. The cubic root of 28313077 is about 304.7864742163.

The spelling of 28313077 in words is "twenty-eight million, three hundred thirteen thousand, seventy-seven".