978399162 has 96 divisors (see below), whose sum is σ = 2470785408. Its totient is φ = 287914176.

The previous prime is 978399137. The next prime is 978399197. The reversal of 978399162 is 261993879.

978399162 is a `hidden beast` number, since 97 + 8 + 399 + 162 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 978399099 and 978399108.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 141948 + ... + 148680.

It is an arithmetic number, because the mean of its divisors is an integer number (25737348).

Almost surely, 2^978399162 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 978399162, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1235392704).

978399162 is an abundant number, since it is smaller than the sum of its proper divisors (1492386246).

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

978399162 is a wasteful number, since it uses less digits than its factorization.

978399162 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6786 (or 6774 counting only the distinct ones).

The product of its digits is 1469664, while the sum is 54.

The square root of 978399162 is about 31279.3727878294. The cubic root of 978399162 is about 992.7472453881.

The spelling of 978399162 in words is "nine hundred seventy-eight million, three hundred ninety-nine thousand, one hundred sixty-two".