82775385 has 64 divisors (see below), whose sum is σ = 183490560. Its totient is φ = 34395840.

The previous prime is 82775383. The next prime is 82775411. The reversal of 82775385 is 58357728.

It is not a de Polignac number, because 82775385 - 2¹ = 82775383 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 82775385.

It is not an unprimeable number, because it can be changed into a prime (82775383) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6414 + ... + 14376.

It is an arithmetic number, because the mean of its divisors is an integer number (2867040).

Almost surely, 2^82775385 is an apocalyptic number.

It is an amenable number.

82775385 is an abundant number, since it is smaller than the sum of its proper divisors (100715175).

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

82775385 is a wasteful number, since it uses less digits than its factorization.

82775385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7995 (or 7989 counting only the distinct ones).

The product of its digits is 470400, while the sum is 45.

The square root of 82775385 is about 9098.0978781282. The cubic root of 82775385 is about 435.8132231016.

The spelling of 82775385 in words is "eighty-two million, seven hundred seventy-five thousand, three hundred eighty-five".