201266728 has 32 divisors (see below), whose sum is σ = 420424200. Its totient is φ = 89687808.

The previous prime is 201266719. The next prime is 201266729. The reversal of 201266728 is 827662102.

It can be written as a sum of positive squares in 4 ways, for example, as 190495204 + 10771524 = 13802^2 + 3282^2 .

It is a junction number, because it is equal to n+sod(n) for n = 201266693 and 201266702.

It is not an unprimeable number, because it can be changed into a prime (201266729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30351 + ... + 36382.

Almost surely, 2^201266728 is an apocalyptic number.

It is an amenable number.

201266728 is an abundant number, since it is smaller than the sum of its proper divisors (219157472).

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

201266728 is a wasteful number, since it uses less digits than its factorization.

201266728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66781 (or 66777 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 201266728 is about 14186.8505313900. The cubic root of 201266728 is about 586.0355952239.

The spelling of 201266728 in words is "two hundred one million, two hundred sixty-six thousand, seven hundred twenty-eight".