82878384 has 80 divisors (see below), whose sum is σ = 228985344. Its totient is φ = 25766400.

The previous prime is 82878359. The next prime is 82878391. The reversal of 82878384 is 48387828.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44349 + ... + 46179.

Almost surely, 2^82878384 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 82878384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114492672).

82878384 is an abundant number, since it is smaller than the sum of its proper divisors (146106960).

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

82878384 is a wasteful number, since it uses less digits than its factorization.

82878384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1906 (or 1900 counting only the distinct ones).

The product of its digits is 688128, while the sum is 48.

The square root of 82878384 is about 9103.7565872556. The cubic root of 82878384 is about 435.9939117630.

The spelling of 82878384 in words is "eighty-two million, eight hundred seventy-eight thousand, three hundred eighty-four".