84378504 has 64 divisors (see below), whose sum is σ = 241856640. Its totient is φ = 24030720.

The previous prime is 84378493. The next prime is 84378521. The reversal of 84378504 is 40587348.

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, 70132 + ... + 71324.

It is an arithmetic number, because the mean of its divisors is an integer number (3779010).

Almost surely, 2^84378504 is an apocalyptic number.

84378504 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 84378504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120928320).

84378504 is an abundant number, since it is smaller than the sum of its proper divisors (157478136).

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

84378504 is a wasteful number, since it uses less digits than its factorization.

84378504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1630 (or 1626 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 39.

The square root of 84378504 is about 9185.7772670580. Note that the first 3 decimals coincide. The cubic root of 84378504 is about 438.6087322083.

The spelling of 84378504 in words is "eighty-four million, three hundred seventy-eight thousand, five hundred four".