978098394 has 128 divisors (see below), whose sum is σ = 2471067648. Its totient is φ = 251274240.

The previous prime is 978098377. The next prime is 978098467. The reversal of 978098394 is 493890879.

978098394 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5120839 + ... + 5121029.

It is an arithmetic number, because the mean of its divisors is an integer number (19305216).

Almost surely, 2^978098394 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 978098394, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1235533824).

978098394 is an abundant number, since it is smaller than the sum of its proper divisors (1492969254).

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

978098394 is a wasteful number, since it uses less digits than its factorization.

978098394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412.

The product of its (nonzero) digits is 3919104, while the sum is 57.

The square root of 978098394 is about 31274.5646492481. The cubic root of 978098394 is about 992.6455087226.

The spelling of 978098394 in words is "nine hundred seventy-eight million, ninety-eight thousand, three hundred ninety-four".