82778694 has 16 divisors (see below), whose sum is σ = 170032368. Its totient is φ = 26847072.

The previous prime is 82778693. The next prime is 82778699. The reversal of 82778694 is 49687728.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82778693) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 186217 + ... + 186660.

It is an arithmetic number, because the mean of its divisors is an integer number (10627023).

Almost surely, 2^82778694 is an apocalyptic number.

82778694 is an abundant number, since it is smaller than the sum of its proper divisors (87253674).

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

82778694 is a wasteful number, since it uses less digits than its factorization.

82778694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372919.

The product of its digits is 1354752, while the sum is 51.

The square root of 82778694 is about 9098.2797275089. The cubic root of 82778694 is about 435.8190303301.

The spelling of 82778694 in words is "eighty-two million, seven hundred seventy-eight thousand, six hundred ninety-four".