978934395 has 16 divisors (see below), whose sum is σ = 1634395392. Its totient is φ = 499398240.

The previous prime is 978934393. The next prime is 978934403. The reversal of 978934395 is 593439879.

It is not a de Polignac number, because 978934395 - 2¹ = 978934393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (978934393) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1418401 + ... + 1419090.

It is an arithmetic number, because the mean of its divisors is an integer number (102149712).

Almost surely, 2^978934395 is an apocalyptic number.

978934395 is a deficient number, since it is larger than the sum of its proper divisors (655460997).

978934395 is a wasteful number, since it uses less digits than its factorization.

978934395 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2837522.

The product of its digits is 7348320, while the sum is 57.

The square root of 978934395 is about 31287.9273043134. The cubic root of 978934395 is about 992.9282397595.

The spelling of 978934395 in words is "nine hundred seventy-eight million, nine hundred thirty-four thousand, three hundred ninety-five".