28771946 has 16 divisors (see below), whose sum is σ = 49834176. Its totient is φ = 12203136.

The previous prime is 28771913. The next prime is 28771949. The reversal of 28771946 is 64917782.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a nialpdrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 28771897 and 28771906.

It is not an unprimeable number, because it can be changed into a prime (28771949) 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 7 ways as a sum of consecutive naturals, for example, 9236 + ... + 11951.

It is an arithmetic number, because the mean of its divisors is an integer number (3114636).

Almost surely, 2^28771946 is an apocalyptic number.

28771946 is a deficient number, since it is larger than the sum of its proper divisors (21062230).

28771946 is a wasteful number, since it uses less digits than its factorization.

28771946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21293.

The product of its digits is 169344, while the sum is 44.

The square root of 28771946 is about 5363.9487320443. The cubic root of 28771946 is about 306.4242126380.

The spelling of 28771946 in words is "twenty-eight million, seven hundred seventy-one thousand, nine hundred forty-six".