998642634 has 32 divisors (see below), whose sum is σ = 2206448640. Its totient is φ = 298786800.

The previous prime is 998642629. The next prime is 998642647. The reversal of 998642634 is 436246899.

998642634 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×998642634² = 1994574220884915912, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90552 + ... + 100979.

It is an arithmetic number, because the mean of its divisors is an integer number (68951520).

Almost surely, 2^998642634 is an apocalyptic number.

998642634 is an abundant number, since it is smaller than the sum of its proper divisors (1207806006).

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

998642634 is a wasteful number, since it uses less digits than its factorization.

998642634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191626.

The product of its digits is 2239488, while the sum is 51.

The square root of 998642634 is about 31601.3074729512. The cubic root of 998642634 is about 999.5473397963.

The spelling of 998642634 in words is "nine hundred ninety-eight million, six hundred forty-two thousand, six hundred thirty-four".