998369728 has 28 divisors (see below), whose sum is σ = 1983607920. Its totient is φ = 498563072.

The previous prime is 998369711. The next prime is 998369731. The reversal of 998369728 is 827963899.

It is a happy number.

It is a super-2 number, since 2×998369728² = 1993484227573587968, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44400 + ... + 62992.

It is an arithmetic number, because the mean of its divisors is an integer number (70843140).

Almost surely, 2^998369728 is an apocalyptic number.

It is an amenable number.

998369728 is a deficient number, since it is larger than the sum of its proper divisors (985238192).

998369728 is a wasteful number, since it uses less digits than its factorization.

998369728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19444 (or 19434 counting only the distinct ones).

The product of its digits is 11757312, while the sum is 61.

The square root of 998369728 is about 31596.9892236586. The cubic root of 998369728 is about 999.4562804226.

The spelling of 998369728 in words is "nine hundred ninety-eight million, three hundred sixty-nine thousand, seven hundred twenty-eight".