201891268 has 12 divisors (see below), whose sum is σ = 353426220. Its totient is φ = 100912352.

The previous prime is 201891259. The next prime is 201891281. The reversal of 201891268 is 862198102.

It can be written as a sum of positive squares in 2 ways, for example, as 32058244 + 169833024 = 5662^2 + 13032^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9630 + ... + 22282.

It is an arithmetic number, because the mean of its divisors is an integer number (29452185).

Almost surely, 2^201891268 is an apocalyptic number.

It is an amenable number.

201891268 is a deficient number, since it is larger than the sum of its proper divisors (151534952).

201891268 is a wasteful number, since it uses less digits than its factorization.

201891268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16646 (or 16644 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 201891268 is about 14208.8447102500. The cubic root of 201891268 is about 586.6411345351.

The spelling of 201891268 in words is "two hundred one million, eight hundred ninety-one thousand, two hundred sixty-eight".