201428650 has 12 divisors (see below), whose sum is σ = 374657382. Its totient is φ = 80571440.

The previous prime is 201428639. The next prime is 201428651. The reversal of 201428650 is 56824102.

It can be written as a sum of positive squares in 3 ways, for example, as 125372809 + 76055841 = 11197^2 + 8721^2 .

It is not an unprimeable number, because it can be changed into a prime (201428651) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 2014237 + ... + 2014336.

Almost surely, 2^201428650 is an apocalyptic number.

201428650 is a deficient number, since it is larger than the sum of its proper divisors (173228732).

201428650 is a wasteful number, since it uses less digits than its factorization.

201428650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4028585 (or 4028580 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 201428650 is about 14192.5561475021. The cubic root of 201428650 is about 586.1927111410.

The spelling of 201428650 in words is "two hundred one million, four hundred twenty-eight thousand, six hundred fifty".