201284390 has 8 divisors (see below), whose sum is σ = 362311920. Its totient is φ = 80513752.

The previous prime is 201284381. The next prime is 201284393. The reversal of 201284390 is 93482102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201284393) 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 3 ways as a sum of consecutive naturals, for example, 10064210 + ... + 10064229.

It is an arithmetic number, because the mean of its divisors is an integer number (45288990).

Almost surely, 2^201284390 is an apocalyptic number.

201284390 is a deficient number, since it is larger than the sum of its proper divisors (161027530).

201284390 is a wasteful number, since it uses less digits than its factorization.

201284390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20128446.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 201284390 is about 14187.4729955690. The cubic root of 201284390 is about 586.0527370834.

The spelling of 201284390 in words is "two hundred one million, two hundred eighty-four thousand, three hundred ninety".