28717773 has 12 divisors (see below), whose sum is σ = 44542080. Its totient is φ = 16410072.

The previous prime is 28717757. The next prime is 28717781. The reversal of 28717773 is 37771782.

It is not a de Polignac number, because 28717773 - 2⁴ = 28717757 is a prime.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28717973) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 97533 + ... + 97826.

It is an arithmetic number, because the mean of its divisors is an integer number (3711840).

Almost surely, 2^28717773 is an apocalyptic number.

It is an amenable number.

28717773 is a deficient number, since it is larger than the sum of its proper divisors (15824307).

28717773 is a wasteful number, since it uses less digits than its factorization.

28717773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195376 (or 195369 counting only the distinct ones).

The product of its digits is 115248, while the sum is 42.

The square root of 28717773 is about 5358.8966215071. The cubic root of 28717773 is about 306.2317757863.

The spelling of 28717773 in words is "twenty-eight million, seven hundred seventeen thousand, seven hundred seventy-three".