198011730 has 64 divisors (see below), whose sum is σ = 571714560. Its totient is φ = 42876864.

The previous prime is 198011713. The next prime is 198011731. The reversal of 198011730 is 37110891.

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

It is not an unprimeable number, because it can be changed into a prime (198011731) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20824 + ... + 28803.

It is an arithmetic number, because the mean of its divisors is an integer number (8933040).

Almost surely, 2^198011730 is an apocalyptic number.

198011730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

198011730 is an abundant number, since it is smaller than the sum of its proper divisors (373702830).

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

198011730 is a wasteful number, since it uses less digits than its factorization.

198011730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49663.

The product of its (nonzero) digits is 1512, while the sum is 30.

The square root of 198011730 is about 14071.6640806978. The cubic root of 198011730 is about 582.8591778675.

The spelling of 198011730 in words is "one hundred ninety-eight million, eleven thousand, seven hundred thirty".