978422 has 16 divisors (see below), whose sum is σ = 1554432. Its totient is φ = 461160.

The previous prime is 978413. The next prime is 978427. The reversal of 978422 is 224879.

It is a super-2 number, since 2×978422² = 1914619220168, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 978422.

It is not an unprimeable number, because it can be changed into a prime (978427) 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, 2483 + ... + 2849.

It is an arithmetic number, because the mean of its divisors is an integer number (97152).

2⁹⁷⁸⁴²² is an apocalyptic number.

978422 is a deficient number, since it is larger than the sum of its proper divisors (576010).

978422 is a wasteful number, since it uses less digits than its factorization.

978422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443.

The product of its digits is 8064, while the sum is 32.

The square root of 978422 is about 989.1521622076. The cubic root of 978422 is about 99.2754969633.

The spelling of 978422 in words is "nine hundred seventy-eight thousand, four hundred twenty-two".