82775172 has 48 divisors (see below), whose sum is σ = 208060160. Its totient is φ = 25528608.

The previous prime is 82775167. The next prime is 82775201. The reversal of 82775172 is 27157728.

It is a self number, because there is not a number n which added to its sum of digits gives 82775172.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5583 + ... + 14025.

Almost surely, 2^82775172 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 82775172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104030080).

82775172 is an abundant number, since it is smaller than the sum of its proper divisors (125284988).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

82775172 is a wasteful number, since it uses less digits than its factorization.

82775172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8512 (or 8510 counting only the distinct ones).

The product of its digits is 54880, while the sum is 39.

The square root of 82775172 is about 9098.0861723771. The cubic root of 82775172 is about 435.8128492855.

The spelling of 82775172 in words is "eighty-two million, seven hundred seventy-five thousand, one hundred seventy-two".