978730 has 16 divisors (see below), whose sum is σ = 1781640. Its totient is φ = 387072.

The previous prime is 978727. The next prime is 978743. The reversal of 978730 is 37879.

It can be written as a sum of positive squares in 4 ways, for example, as 677329 + 301401 = 823^2 + 549^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 466 + ... + 1474.

2⁹⁷⁸⁷³⁰ is an apocalyptic number.

978730 is a deficient number, since it is larger than the sum of its proper divisors (802910).

978730 is a wasteful number, since it uses less digits than its factorization.

978730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1113.

The product of its (nonzero) digits is 10584, while the sum is 34.

The square root of 978730 is about 989.3078388449. The cubic root of 978730 is about 99.2859129342.

The spelling of 978730 in words is "nine hundred seventy-eight thousand, seven hundred thirty".