28475577 has 32 divisors (see below), whose sum is σ = 46914560. Its totient is φ = 16951680.

The previous prime is 28475569. The next prime is 28475581. The reversal of 28475577 is 77557482.

28475577 is a `hidden beast` number, since 2 + 8 + 4 + 75 + 577 = 666.

It is not a de Polignac number, because 28475577 - 2³ = 28475569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28475537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9573 + ... + 12189.

It is an arithmetic number, because the mean of its divisors is an integer number (1466080).

Almost surely, 2^28475577 is an apocalyptic number.

28475577 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

28475577 is a deficient number, since it is larger than the sum of its proper divisors (18438983).

28475577 is a wasteful number, since it uses less digits than its factorization.

28475577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2670 (or 2664 counting only the distinct ones).

The product of its digits is 548800, while the sum is 45.

The square root of 28475577 is about 5336.2512122276. The cubic root of 28475577 is about 305.3684591154.

The spelling of 28475577 in words is "twenty-eight million, four hundred seventy-five thousand, five hundred seventy-seven".