83878478 has 4 divisors (see below), whose sum is σ = 125817720. Its totient is φ = 41939238.

The previous prime is 83878451. The next prime is 83878499. The reversal of 83878478 is 87487838.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 20969618 + ... + 20969621.

It is an arithmetic number, because the mean of its divisors is an integer number (31454430).

Almost surely, 2^83878478 is an apocalyptic number.

83878478 is a deficient number, since it is larger than the sum of its proper divisors (41939242).

83878478 is a wasteful number, since it uses less digits than its factorization.

83878478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41939241.

The product of its digits is 2408448, while the sum is 53.

The square root of 83878478 is about 9158.5194218280. The cubic root of 83878478 is about 437.7406184419.

The spelling of 83878478 in words is "eighty-three million, eight hundred seventy-eight thousand, four hundred seventy-eight".