82775380 has 36 divisors (see below), whose sum is σ = 184667868. Its totient is φ = 31160320.

The previous prime is 82775369. The next prime is 82775383. The reversal of 82775380 is 8357728.

It can be written as a sum of positive squares in 6 ways, for example, as 1089936 + 81685444 = 1044^2 + 9038^2 .

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 1381 + ... + 12940.

It is an arithmetic number, because the mean of its divisors is an integer number (5129663).

Almost surely, 2^82775380 is an apocalyptic number.

It is an amenable number.

82775380 is an abundant number, since it is smaller than the sum of its proper divisors (101892488).

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

82775380 is a wasteful number, since it uses less digits than its factorization.

82775380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14364 (or 14345 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 40.

The square root of 82775380 is about 9098.0976033454. The cubic root of 82775380 is about 435.8132143265.

The spelling of 82775380 in words is "eighty-two million, seven hundred seventy-five thousand, three hundred eighty".