998620392 has 384 divisors, whose sum is σ = 3545856000. Its totient is φ = 230307840.

The previous prime is 998620387. The next prime is 998620397. The reversal of 998620392 is 293026899.

It is an interprime number because it is at equal distance from previous prime (998620387) and next prime (998620397).

It is not an unprimeable number, because it can be changed into a prime (998620397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4178209 + ... + 4178447.

It is an arithmetic number, because the mean of its divisors is an integer number (9234000).

Almost surely, 2^998620392 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 998620392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1772928000).

998620392 is an abundant number, since it is smaller than the sum of its proper divisors (2547235608).

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

998620392 is a wasteful number, since it uses less digits than its factorization.

998620392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309 (or 298 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 48.

The square root of 998620392 is about 31600.9555551727. The cubic root of 998620392 is about 999.5399190246.

The spelling of 998620392 in words is "nine hundred ninety-eight million, six hundred twenty thousand, three hundred ninety-two".