83686404 has 12 divisors (see below), whose sum is σ = 195268304. Its totient is φ = 27895464.

The previous prime is 83686403. The next prime is 83686411. The reversal of 83686404 is 40468638.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (83686403) 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 3 ways as a sum of consecutive naturals, for example, 3486922 + ... + 3486945.

Almost surely, 2^83686404 is an apocalyptic number.

It is an amenable number.

83686404 is an abundant number, since it is smaller than the sum of its proper divisors (111581900).

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

83686404 is a wasteful number, since it uses less digits than its factorization.

83686404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6973874 (or 6973872 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 39.

The square root of 83686404 is about 9148.0273283370. The cubic root of 83686404 is about 437.4062344905.

The spelling of 83686404 in words is "eighty-three million, six hundred eighty-six thousand, four hundred four".