82878772 has 6 divisors (see below), whose sum is σ = 145037858. Its totient is φ = 41439384.

The previous prime is 82878769. The next prime is 82878773. The reversal of 82878772 is 27787828.

It can be written as a sum of positive squares in only one way, i.e., 63904036 + 18974736 = 7994^2 + 4356^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82878773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10359843 + ... + 10359850.

Almost surely, 2^82878772 is an apocalyptic number.

It is an amenable number.

82878772 is a deficient number, since it is larger than the sum of its proper divisors (62159086).

82878772 is a wasteful number, since it uses less digits than its factorization.

82878772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20719697 (or 20719695 counting only the distinct ones).

The product of its digits is 702464, while the sum is 49.

The square root of 82878772 is about 9103.7778971150. Note that the first 3 decimals coincide. The cubic root of 82878772 is about 435.9945921390.

The spelling of 82878772 in words is "eighty-two million, eight hundred seventy-eight thousand, seven hundred seventy-two".