28773171 has 16 divisors (see below), whose sum is σ = 48716800. Its totient is φ = 16441704.

The previous prime is 28773137. The next prime is 28773181. The reversal of 28773171 is 17137782.

It is a happy number.

It is not a de Polignac number, because 28773171 - 2¹⁴ = 28756787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28773131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75931 + ... + 76308.

It is an arithmetic number, because the mean of its divisors is an integer number (3044800).

Almost surely, 2^28773171 is an apocalyptic number.

28773171 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

28773171 is a deficient number, since it is larger than the sum of its proper divisors (19943629).

28773171 is a wasteful number, since it uses less digits than its factorization.

28773171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152255 (or 152249 counting only the distinct ones).

The product of its digits is 16464, while the sum is 36.

The square root of 28773171 is about 5364.0629190941. The cubic root of 28773171 is about 306.4285613687.

The spelling of 28773171 in words is "twenty-eight million, seven hundred seventy-three thousand, one hundred seventy-one".