198402988 has 48 divisors (see below), whose sum is σ = 427097664. Its totient is φ = 78704640.

The previous prime is 198402979. The next prime is 198403001. The reversal of 198402988 is 889204891.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25620 + ... + 32452.

It is an arithmetic number, because the mean of its divisors is an integer number (8897868).

Almost surely, 2^198402988 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 198402988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (213548832).

198402988 is an abundant number, since it is smaller than the sum of its proper divisors (228694676).

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

198402988 is a wasteful number, since it uses less digits than its factorization.

198402988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6922 (or 6920 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 49.

The square root of 198402988 is about 14085.5595558004. The cubic root of 198402988 is about 583.2428222743.

The spelling of 198402988 in words is "one hundred ninety-eight million, four hundred two thousand, nine hundred eighty-eight".