82907878 has 16 divisors (see below), whose sum is σ = 131861520. Its totient is φ = 38960896.

The previous prime is 82907873. The next prime is 82907899. The reversal of 82907878 is 87870928.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82907873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33450 + ... + 35842.

It is an arithmetic number, because the mean of its divisors is an integer number (8241345).

Almost surely, 2^82907878 is an apocalyptic number.

82907878 is a deficient number, since it is larger than the sum of its proper divisors (48953642).

82907878 is a wasteful number, since it uses less digits than its factorization.

82907878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3431.

The product of its (nonzero) digits is 451584, while the sum is 49.

The square root of 82907878 is about 9105.3763239089. The cubic root of 82907878 is about 436.0456248021.

The spelling of 82907878 in words is "eighty-two million, nine hundred seven thousand, eight hundred seventy-eight".