198100380 has 48 divisors (see below), whose sum is σ = 578801664. Its totient is φ = 50529600.

The previous prime is 198100349. The next prime is 198100381. The reversal of 198100380 is 83001891.

It is a super-2 number, since 2×198100380² = 78487521112288800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198100381) 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, 70396 + ... + 73155.

It is an arithmetic number, because the mean of its divisors is an integer number (12058368).

Almost surely, 2^198100380 is an apocalyptic number.

198100380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

198100380 is an abundant number, since it is smaller than the sum of its proper divisors (380701284).

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

198100380 is a wasteful number, since it uses less digits than its factorization.

198100380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143586 (or 143584 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 30.

The square root of 198100380 is about 14074.8136754985. The cubic root of 198100380 is about 582.9461470537.

The spelling of 198100380 in words is "one hundred ninety-eight million, one hundred thousand, three hundred eighty".