998231156 has 48 divisors (see below), whose sum is σ = 1964331600. Its totient is φ = 440681472.

The previous prime is 998231153. The next prime is 998231159. The reversal of 998231156 is 651132899.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (998231153) and next prime (998231159).

It can be written as a sum of positive squares in 8 ways, for example, as 24167056 + 974064100 = 4916^2 + 31210^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998231153) 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, 161336 + ... + 167408.

It is an arithmetic number, because the mean of its divisors is an integer number (40923575).

Almost surely, 2^998231156 is an apocalyptic number.

It is an amenable number.

998231156 is a deficient number, since it is larger than the sum of its proper divisors (966100444).

998231156 is a wasteful number, since it uses less digits than its factorization.

998231156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6228 (or 6226 counting only the distinct ones).

The product of its digits is 116640, while the sum is 44.

The square root of 998231156 is about 31594.7963437019. The cubic root of 998231156 is about 999.4100373458.

The spelling of 998231156 in words is "nine hundred ninety-eight million, two hundred thirty-one thousand, one hundred fifty-six".