998730831 has 16 divisors (see below), whose sum is σ = 1536102144. Its totient is φ = 565368384.

The previous prime is 998730827. The next prime is 998730833. The reversal of 998730831 is 138037899.

It is not a de Polignac number, because 998730831 - 2² = 998730827 is a prime.

It is a super-2 number, since 2×998730831² = 1994926545579901122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998730833) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 219990 + ... + 224483.

It is an arithmetic number, because the mean of its divisors is an integer number (96006384).

Almost surely, 2^998730831 is an apocalyptic number.

998730831 is a deficient number, since it is larger than the sum of its proper divisors (537371313).

998730831 is a wasteful number, since it uses less digits than its factorization.

998730831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444590.

The product of its (nonzero) digits is 326592, while the sum is 48.

The square root of 998730831 is about 31602.7029065553. The cubic root of 998730831 is about 999.5767645637.

The spelling of 998730831 in words is "nine hundred ninety-eight million, seven hundred thirty thousand, eight hundred thirty-one".