978398345 has 8 divisors (see below), whose sum is σ = 1176144840. Its totient is φ = 781340800.

The previous prime is 978398327. The next prime is 978398359. The reversal of 978398345 is 543893879.

It can be written as a sum of positive squares in 4 ways, for example, as 7639696 + 970758649 = 2764^2 + 31157^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 978398345 - 2⁸ = 978398089 is a prime.

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, 169106 + ... + 174795.

It is an arithmetic number, because the mean of its divisors is an integer number (147018105).

Almost surely, 2^978398345 is an apocalyptic number.

It is an amenable number.

978398345 is a deficient number, since it is larger than the sum of its proper divisors (197746495).

978398345 is a wasteful number, since it uses less digits than its factorization.

978398345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344475.

The product of its digits is 6531840, while the sum is 56.

The square root of 978398345 is about 31279.3597281019. The cubic root of 978398345 is about 992.7469690610.

The spelling of 978398345 in words is "nine hundred seventy-eight million, three hundred ninety-eight thousand, three hundred forty-five".