83616878 has 16 divisors (see below), whose sum is σ = 126596976. Its totient is φ = 41420160.

The previous prime is 83616877. The next prime is 83616893. The reversal of 83616878 is 87861638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83616877) by changing a digit.

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, 136100 + ... + 136712.

It is an arithmetic number, because the mean of its divisors is an integer number (7912311).

Almost surely, 2^83616878 is an apocalyptic number.

83616878 is a deficient number, since it is larger than the sum of its proper divisors (42980098).

83616878 is a wasteful number, since it uses less digits than its factorization.

83616878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1139.

The product of its digits is 387072, while the sum is 47.

The square root of 83616878 is about 9144.2264845092. The cubic root of 83616878 is about 437.2850697212.

The spelling of 83616878 in words is "eighty-three million, six hundred sixteen thousand, eight hundred seventy-eight".