978689340 has 36 divisors (see below), whose sum is σ = 2968691544. Its totient is φ = 260983776.

The previous prime is 978689317. The next prime is 978689351. The reversal of 978689340 is 43986879.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 2718402 + ... + 2718761.

It is an arithmetic number, because the mean of its divisors is an integer number (82463654).

Almost surely, 2^978689340 is an apocalyptic number.

978689340 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

978689340 is an abundant number, since it is smaller than the sum of its proper divisors (1990002204).

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

978689340 is a wasteful number, since it uses less digits than its factorization.

978689340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5437178 (or 5437173 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 54.

The square root of 978689340 is about 31284.0109321040. The cubic root of 978689340 is about 992.8453801599.

The spelling of 978689340 in words is "nine hundred seventy-eight million, six hundred eighty-nine thousand, three hundred forty".