84378740 has 24 divisors (see below), whose sum is σ = 177999360. Its totient is φ = 33598368.

The previous prime is 84378739. The next prime is 84378751. The reversal of 84378740 is 4787348.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5000 + ... + 13919.

It is an arithmetic number, because the mean of its divisors is an integer number (7416640).

Almost surely, 2^84378740 is an apocalyptic number.

It is an amenable number.

84378740 is an abundant number, since it is smaller than the sum of its proper divisors (93620620).

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

84378740 is a wasteful number, since it uses less digits than its factorization.

84378740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19151 (or 19149 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 41.

The square root of 84378740 is about 9185.7901129952. The cubic root of 84378740 is about 438.6091411259.

The spelling of 84378740 in words is "eighty-four million, three hundred seventy-eight thousand, seven hundred forty".