82770740 has 24 divisors (see below), whose sum is σ = 187189800. Its totient is φ = 30561408.

The previous prime is 82770733. The next prime is 82770781. The reversal of 82770740 is 4707728.

It can be written as a sum of positive squares in 4 ways, for example, as 10214416 + 72556324 = 3196^2 + 8518^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 82770740.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158915 + ... + 159434.

It is an arithmetic number, because the mean of its divisors is an integer number (7799575).

Almost surely, 2^82770740 is an apocalyptic number.

It is an amenable number.

82770740 is an abundant number, since it is smaller than the sum of its proper divisors (104419060).

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

82770740 is a wasteful number, since it uses less digits than its factorization.

82770740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318371 (or 318369 counting only the distinct ones).

The product of its (nonzero) digits is 21952, while the sum is 35.

The square root of 82770740 is about 9097.8426014083. The cubic root of 82770740 is about 435.8050709587.

The spelling of 82770740 in words is "eighty-two million, seven hundred seventy thousand, seven hundred forty".