978749670 has 96 divisors (see below), whose sum is σ = 2571282144. Its totient is φ = 237603840.

The previous prime is 978749669. The next prime is 978749671. The reversal of 978749670 is 76947879.

978749670 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (978749669) and next prime (978749671).

It is a self number, because there is not a number n which added to its sum of digits gives 978749670.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978749671) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 489112 + ... + 491108.

It is an arithmetic number, because the mean of its divisors is an integer number (26784189).

Almost surely, 2^978749670 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 978749670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1285641072).

978749670 is an abundant number, since it is smaller than the sum of its proper divisors (1592532474).

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

978749670 is a wasteful number, since it uses less digits than its factorization.

978749670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2086 (or 2055 counting only the distinct ones).

The product of its (nonzero) digits is 5334336, while the sum is 57.

The square root of 978749670 is about 31284.9751478246. The cubic root of 978749670 is about 992.8657806175.

The spelling of 978749670 in words is "nine hundred seventy-eight million, seven hundred forty-nine thousand, six hundred seventy".