1998360 has 192 divisors, whose sum is σ = 8124480. Its totient is φ = 414720.

The previous prime is 1998349. The next prime is 1998371. The reversal of 1998360 is 638991.

1998360 = T₃₇₉ + T₃₈₀ + ... + T₄₀₄.

It is an interprime number because it is at equal distance from previous prime (1998349) and next prime (1998371).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 32730 + ... + 32790.

It is an arithmetic number, because the mean of its divisors is an integer number (42315).

2^1998360 is an apocalyptic number.

1998360 is a gapful number since it is divisible by the number (10) 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 1998360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4062240).

1998360 is an abundant number, since it is smaller than the sum of its proper divisors (6126120).

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

1998360 is a wasteful number, since it uses less digits than its factorization.

1998360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98 (or 91 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 1998360 is about 1413.6336158991. The cubic root of 1998360 is about 125.9576577302.

The spelling of 1998360 in words is "one million, nine hundred ninety-eight thousand, three hundred sixty".