998839774 has 8 divisors (see below), whose sum is σ = 1498721040. Its totient is φ = 499266096.

The previous prime is 998839741. The next prime is 998839799. The reversal of 998839774 is 477938899.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68599 + ... + 81874.

It is an arithmetic number, because the mean of its divisors is an integer number (187340130).

Almost surely, 2^998839774 is an apocalyptic number.

998839774 is a deficient number, since it is larger than the sum of its proper divisors (499881266).

998839774 is a wasteful number, since it uses less digits than its factorization.

998839774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153794.

The product of its digits is 27433728, while the sum is 64.

The square root of 998839774 is about 31604.4264937682. The cubic root of 998839774 is about 999.6131083341.

The spelling of 998839774 in words is "nine hundred ninety-eight million, eight hundred thirty-nine thousand, seven hundred seventy-four".