998437408 has 12 divisors (see below), whose sum is σ = 1965673710. Its totient is φ = 499218688.

The previous prime is 998437399. The next prime is 998437409. The reversal of 998437408 is 804734899.

It can be written as a sum of positive squares in only one way, i.e., 658846224 + 339591184 = 25668^2 + 18428^2 .

It is not an unprimeable number, because it can be changed into a prime (998437409) by changing a digit.

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 as a sum of consecutive naturals, namely, 15600553 + ... + 15600616.

Almost surely, 2^998437408 is an apocalyptic number.

It is an amenable number.

998437408 is a deficient number, since it is larger than the sum of its proper divisors (967236302).

998437408 is a wasteful number, since it uses less digits than its factorization.

998437408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31201179 (or 31201171 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 52.

The square root of 998437408 is about 31598.0601936258. The cubic root of 998437408 is about 999.4788644649.

The spelling of 998437408 in words is "nine hundred ninety-eight million, four hundred thirty-seven thousand, four hundred eight".