200911998 has 32 divisors (see below), whose sum is σ = 471642624. Its totient is φ = 55851552.

The previous prime is 200911973. The next prime is 200911999. The reversal of 200911998 is 899119002.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200911999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63090 + ... + 66197.

It is an arithmetic number, because the mean of its divisors is an integer number (14738832).

Almost surely, 2^200911998 is an apocalyptic number.

200911998 is an abundant number, since it is smaller than the sum of its proper divisors (270730626).

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

200911998 is a wasteful number, since it uses less digits than its factorization.

200911998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129336.

The product of its (nonzero) digits is 11664, while the sum is 39.

The square root of 200911998 is about 14174.3429477348. The cubic root of 200911998 is about 585.6910993739.

The spelling of 200911998 in words is "two hundred million, nine hundred eleven thousand, nine hundred ninety-eight".