28475077 has 4 divisors (see below), whose sum is σ = 28692576. Its totient is φ = 28257580.

The previous prime is 28475063. The next prime is 28475087. The reversal of 28475077 is 77057482.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 77057482 = 2 ⋅38528741.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28475077 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 (28475087) 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, 108553 + ... + 108814.

It is an arithmetic number, because the mean of its divisors is an integer number (7173144).

Almost surely, 2^28475077 is an apocalyptic number.

It is an amenable number.

28475077 is a deficient number, since it is larger than the sum of its proper divisors (217499).

28475077 is a wasteful number, since it uses less digits than its factorization.

28475077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217498.

The product of its (nonzero) digits is 109760, while the sum is 40.

The square root of 28475077 is about 5336.2043626533. The cubic root of 28475077 is about 305.3666717929.

The spelling of 28475077 in words is "twenty-eight million, four hundred seventy-five thousand, seventy-seven".