978418 has 16 divisors (see below), whose sum is σ = 1776384. Its totient is φ = 394560.

The previous prime is 978413. The next prime is 978427. The reversal of 978418 is 814879.

It is not an unprimeable number, because it can be changed into a prime (978413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1818 + ... + 2293.

It is an arithmetic number, because the mean of its divisors is an integer number (111024).

2⁹⁷⁸⁴¹⁸ is an apocalyptic number.

978418 is a deficient number, since it is larger than the sum of its proper divisors (797966).

978418 is a wasteful number, since it uses less digits than its factorization.

978418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4137.

The product of its digits is 16128, while the sum is 37.

The square root of 978418 is about 989.1501402719. The cubic root of 978418 is about 99.2753616766.

It can be divided in two parts, 978 and 418, that multiplied together give a palindrome (408804).

The spelling of 978418 in words is "nine hundred seventy-eight thousand, four hundred eighteen".