201285778 has 8 divisors (see below), whose sum is σ = 302913072. Its totient is φ = 100314756.

The previous prime is 201285727. The next prime is 201285779. The reversal of 201285778 is 877582102.

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

It is a self number, because there is not a number n which added to its sum of digits gives 201285778.

It is not an unprimeable number, because it can be changed into a prime (201285779) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 163300 + ... + 164527.

It is an arithmetic number, because the mean of its divisors is an integer number (37864134).

Almost surely, 2^201285778 is an apocalyptic number.

201285778 is a deficient number, since it is larger than the sum of its proper divisors (101627294).

201285778 is a wasteful number, since it uses less digits than its factorization.

201285778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328136.

The product of its (nonzero) digits is 62720, while the sum is 40.

The square root of 201285778 is about 14187.5219118774. The cubic root of 201285778 is about 586.0540841648.

The spelling of 201285778 in words is "two hundred one million, two hundred eighty-five thousand, seven hundred seventy-eight".