28575477 has 24 divisors (see below), whose sum is σ = 49248000. Its totient is φ = 16328088.

The previous prime is 28575473. The next prime is 28575509. The reversal of 28575477 is 77457582.

28575477 is a `hidden beast` number, since 2 + 8 + 575 + 4 + 77 = 666.

It is not a de Polignac number, because 28575477 - 2² = 28575473 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28575473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9477 + ... + 12122.

It is an arithmetic number, because the mean of its divisors is an integer number (2052000).

Almost surely, 2^28575477 is an apocalyptic number.

28575477 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

28575477 is a deficient number, since it is larger than the sum of its proper divisors (20672523).

28575477 is a wasteful number, since it uses less digits than its factorization.

28575477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21622 (or 21609 counting only the distinct ones).

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

The square root of 28575477 is about 5345.6035206513. The cubic root of 28575477 is about 305.7251472772.

The spelling of 28575477 in words is "twenty-eight million, five hundred seventy-five thousand, four hundred seventy-seven".