998687232 has 240 divisors, whose sum is σ = 3127924800. Its totient is φ = 317509632.

The previous prime is 998687201. The next prime is 998687237. The reversal of 998687232 is 232786899.

It is a happy number.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (998687237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2861394 + ... + 2861742.

It is an arithmetic number, because the mean of its divisors is an integer number (13033020).

Almost surely, 2^998687232 is an apocalyptic number.

998687232 is a gapful number since it is divisible by the number (92) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 998687232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1563962400).

998687232 is an abundant number, since it is smaller than the sum of its proper divisors (2129237568).

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

998687232 is an equidigital number, since it uses as much as digits as its factorization.

998687232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405 (or 377 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 54.

The square root of 998687232 is about 31602.0131004340. The cubic root of 998687232 is about 999.5622190425.

The spelling of 998687232 in words is "nine hundred ninety-eight million, six hundred eighty-seven thousand, two hundred thirty-two".