990657834 has 16 divisors (see below), whose sum is σ = 2085595680. Its totient is φ = 312839280.

The previous prime is 990657827. The next prime is 990657839. The reversal of 990657834 is 438756099.

990657834 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (990657839) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4344877 + ... + 4345104.

It is an arithmetic number, because the mean of its divisors is an integer number (130349730).

Almost surely, 2^990657834 is an apocalyptic number.

990657834 is an abundant number, since it is smaller than the sum of its proper divisors (1094937846).

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

990657834 is a wasteful number, since it uses less digits than its factorization.

990657834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8690005.

The product of its (nonzero) digits is 1632960, while the sum is 51.

The square root of 990657834 is about 31474.7173776032. The cubic root of 990657834 is about 996.8761966803.

The spelling of 990657834 in words is "nine hundred ninety million, six hundred fifty-seven thousand, eight hundred thirty-four".