840084378 has 32 divisors (see below), whose sum is σ = 1964852736. Its totient is φ = 234441648.

The previous prime is 840084347. The next prime is 840084389. The reversal of 840084378 is 873480048.

It is a Harshad number since it is a multiple of its sum of digits (42).

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, 230776 + ... + 234387.

It is an arithmetic number, because the mean of its divisors is an integer number (61401648).

Almost surely, 2^840084378 is an apocalyptic number.

840084378 is an abundant number, since it is smaller than the sum of its proper divisors (1124768358).

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

840084378 is a wasteful number, since it uses less digits than its factorization.

840084378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465218.

The product of its (nonzero) digits is 172032, while the sum is 42.

The square root of 840084378 is about 28984.2091146196. The cubic root of 840084378 is about 943.5703878296.

The spelling of 840084378 in words is "eight hundred forty million, eighty-four thousand, three hundred seventy-eight".