201778830 has 64 divisors (see below), whose sum is σ = 587001600. Its totient is φ = 48915360.

The previous prime is 201778817. The next prime is 201778847. The reversal of 201778830 is 38877102.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31000 + ... + 36939.

It is an arithmetic number, because the mean of its divisors is an integer number (9171900).

Almost surely, 2^201778830 is an apocalyptic number.

201778830 is an abundant number, since it is smaller than the sum of its proper divisors (385222770).

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

201778830 is a wasteful number, since it uses less digits than its factorization.

201778830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67966 (or 67960 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 36.

The square root of 201778830 is about 14204.8875391536. The cubic root of 201778830 is about 586.5322095588.

The spelling of 201778830 in words is "two hundred one million, seven hundred seventy-eight thousand, eight hundred thirty".