998670442 has 128 divisors (see below), whose sum is σ = 2043740160. Its totient is φ = 354594240.

The previous prime is 998670427. The next prime is 998670461. The reversal of 998670442 is 244076899.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12032133 + ... + 12032215.

It is an arithmetic number, because the mean of its divisors is an integer number (15966720).

Almost surely, 2^998670442 is an apocalyptic number.

998670442 is the 19987-th heptagonal number.

998670442 is an abundant number, since it is smaller than the sum of its proper divisors (1045069718).

998670442 is a wasteful number, since it uses less digits than its factorization.

998670442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248.

The product of its (nonzero) digits is 870912, while the sum is 49.

The square root of 998670442 is about 31601.7474516837. The cubic root of 998670442 is about 999.5566174410.

The spelling of 998670442 in words is "nine hundred ninety-eight million, six hundred seventy thousand, four hundred forty-two".