28512477 has 12 divisors (see below), whose sum is σ = 47068320. Its totient is φ = 16292808.

The previous prime is 28512439. The next prime is 28512487. The reversal of 28512477 is 77421582.

It is not a de Polignac number, because 28512477 - 2¹⁸ = 28250333 is a prime.

It is a super-2 number, since 2×28512477² = 1625922689351058, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28512427) 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 11 ways as a sum of consecutive naturals, for example, 226227 + ... + 226352.

It is an arithmetic number, because the mean of its divisors is an integer number (3922360).

Almost surely, 2^28512477 is an apocalyptic number.

It is an amenable number.

28512477 is a deficient number, since it is larger than the sum of its proper divisors (18555843).

28512477 is a wasteful number, since it uses less digits than its factorization.

28512477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452592 (or 452589 counting only the distinct ones).

The product of its digits is 31360, while the sum is 36.

The square root of 28512477 is about 5339.7075762630. The cubic root of 28512477 is about 305.5003058134.

The spelling of 28512477 in words is "twenty-eight million, five hundred twelve thousand, four hundred seventy-seven".