978389078 has 16 divisors (see below), whose sum is σ = 1594659840. Its totient is φ = 448497000.

The previous prime is 978389053. The next prime is 978389099. The reversal of 978389078 is 870983879.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 414098 + ... + 416453.

It is an arithmetic number, because the mean of its divisors is an integer number (99666240).

Almost surely, 2^978389078 is an apocalyptic number.

978389078 is a deficient number, since it is larger than the sum of its proper divisors (616270762).

978389078 is a wasteful number, since it uses less digits than its factorization.

978389078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 830603.

The product of its (nonzero) digits is 6096384, while the sum is 59.

The square root of 978389078 is about 31279.2115949236. The cubic root of 978389078 is about 992.7438347496.

The spelling of 978389078 in words is "nine hundred seventy-eight million, three hundred eighty-nine thousand, seventy-eight".