83431878 has 8 divisors (see below), whose sum is σ = 166863768. Its totient is φ = 27810624.

The previous prime is 83431877. The next prime is 83431889. The reversal of 83431878 is 87813438.

It is a sphenic number, since it is the product of 3 distinct primes.

83431878 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83431877) 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, 6952651 + ... + 6952662.

It is an arithmetic number, because the mean of its divisors is an integer number (20857971).

Almost surely, 2^83431878 is an apocalyptic number.

83431878 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

83431878 is a wasteful number, since it uses less digits than its factorization.

83431878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13905318.

The product of its digits is 129024, while the sum is 42.

The square root of 83431878 is about 9134.1052106925. The cubic root of 83431878 is about 436.9623379370.

The spelling of 83431878 in words is "eighty-three million, four hundred thirty-one thousand, eight hundred seventy-eight".