28685954 has 24 divisors (see below), whose sum is σ = 47760300. Its totient is φ = 12911360.

The previous prime is 28685939. The next prime is 28685957. The reversal of 28685954 is 45958682.

It can be written as a sum of positive squares in 2 ways, for example, as 28462225 + 223729 = 5335^2 + 473^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28685899 and 28685908.

It is not an unprimeable number, because it can be changed into a prime (28685957) 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, 26822 + ... + 27870.

Almost surely, 2^28685954 is an apocalyptic number.

28685954 is a deficient number, since it is larger than the sum of its proper divisors (19074346).

28685954 is a wasteful number, since it uses less digits than its factorization.

28685954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1186 (or 1175 counting only the distinct ones).

The product of its digits is 691200, while the sum is 47.

The square root of 28685954 is about 5355.9269972620. The cubic root of 28685954 is about 306.1186334262.

The spelling of 28685954 in words is "twenty-eight million, six hundred eighty-five thousand, nine hundred fifty-four".