28255077 has 18 divisors (see below), whose sum is σ = 42280082. Its totient is φ = 18182304.

The previous prime is 28255057. The next prime is 28255103. The reversal of 28255077 is 77055282.

It can be written as a sum of positive squares in 3 ways, for example, as 5157441 + 23097636 = 2271^2 + 4806^2 .

It is not a de Polignac number, because 28255077 - 2⁷ = 28254949 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 (28255057) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 5703 + ... + 9435.

Almost surely, 2^28255077 is an apocalyptic number.

It is an amenable number.

28255077 is a deficient number, since it is larger than the sum of its proper divisors (14025005).

28255077 is a wasteful number, since it uses less digits than its factorization.

28255077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3797 (or 3765 counting only the distinct ones).

The product of its (nonzero) digits is 39200, while the sum is 36.

The square root of 28255077 is about 5315.5504888958. The cubic root of 28255077 is about 304.5782112022.

The spelling of 28255077 in words is "twenty-eight million, two hundred fifty-five thousand, seventy-seven".