82645172 has 12 divisors (see below), whose sum is σ = 144779460. Its totient is φ = 41279616.

The previous prime is 82645159. The next prime is 82645201. The reversal of 82645172 is 27154628.

It can be written as a sum of positive squares in 2 ways, for example, as 45751696 + 36893476 = 6764^2 + 6074^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6203 + ... + 14274.

It is an arithmetic number, because the mean of its divisors is an integer number (12064955).

Almost surely, 2^82645172 is an apocalyptic number.

It is an amenable number.

82645172 is a deficient number, since it is larger than the sum of its proper divisors (62134288).

82645172 is a wasteful number, since it uses less digits than its factorization.

82645172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21490 (or 21488 counting only the distinct ones).

The product of its digits is 26880, while the sum is 35.

The square root of 82645172 is about 9090.9390054053. The cubic root of 82645172 is about 435.5845789216.

The spelling of 82645172 in words is "eighty-two million, six hundred forty-five thousand, one hundred seventy-two".