83939878 has 48 divisors (see below), whose sum is σ = 145861632. Its totient is φ = 36154800.

The previous prime is 83939837. The next prime is 83939879. The reversal of 83939878 is 87893938.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83939879) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 502551 + ... + 502717.

It is an arithmetic number, because the mean of its divisors is an integer number (3038784).

Almost surely, 2^83939878 is an apocalyptic number.

83939878 is a deficient number, since it is larger than the sum of its proper divisors (61921754).

83939878 is a wasteful number, since it uses less digits than its factorization.

83939878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289 (or 278 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 55.

The square root of 83939878 is about 9161.8708788107. The cubic root of 83939878 is about 437.8474027610.

The spelling of 83939878 in words is "eighty-three million, nine hundred thirty-nine thousand, eight hundred seventy-eight".