990078170 has 8 divisors (see below), whose sum is σ = 1782140724. Its totient is φ = 396031264.

The previous prime is 990078143. The next prime is 990078191. The reversal of 990078170 is 71870099.

990078170 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 987279241 + 2798929 = 31421^2 + 1673^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49503899 + ... + 49503918.

Almost surely, 2^990078170 is an apocalyptic number.

990078170 is a deficient number, since it is larger than the sum of its proper divisors (792062554).

990078170 is a wasteful number, since it uses less digits than its factorization.

990078170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99007824.

The product of its (nonzero) digits is 31752, while the sum is 41.

The square root of 990078170 is about 31465.5076234279. The cubic root of 990078170 is about 996.6817245606.

The spelling of 990078170 in words is "nine hundred ninety million, seventy-eight thousand, one hundred seventy".