201285690 has 32 divisors (see below), whose sum is σ = 487783296. Its totient is φ = 53154240.

The previous prime is 201285659. The next prime is 201285701. The reversal of 201285690 is 96582102.

It is a super-2 number, since 2×201285690² = 81031857997552200, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29481 + ... + 35660.

It is an arithmetic number, because the mean of its divisors is an integer number (15243228).

Almost surely, 2^201285690 is an apocalyptic number.

201285690 is an abundant number, since it is smaller than the sum of its proper divisors (286497606).

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

201285690 is a wasteful number, since it uses less digits than its factorization.

201285690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65254.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 201285690 is about 14187.5188105602. The cubic root of 201285690 is about 586.0539987592.

The spelling of 201285690 in words is "two hundred one million, two hundred eighty-five thousand, six hundred ninety".