998557284 has 24 divisors (see below), whose sum is σ = 2351345920. Its totient is φ = 329798304.

The previous prime is 998557283. The next prime is 998557297. The reversal of 998557284 is 482755899.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (998557283) 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, 380404 + ... + 383019.

Almost surely, 2^998557284 is an apocalyptic number.

It is an amenable number.

998557284 is an abundant number, since it is smaller than the sum of its proper divisors (1352788636).

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

998557284 is a wasteful number, since it uses less digits than its factorization.

998557284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 763539 (or 763537 counting only the distinct ones).

The product of its digits is 7257600, while the sum is 57.

The square root of 998557284 is about 31599.9570252872. The cubic root of 998557284 is about 999.5188632112.

The spelling of 998557284 in words is "nine hundred ninety-eight million, five hundred fifty-seven thousand, two hundred eighty-four".