201117928 has 32 divisors (see below), whose sum is σ = 416016000. Its totient is φ = 90386560.

The previous prime is 201117919. The next prime is 201117953. The reversal of 201117928 is 829711102.

It is a self number, because there is not a number n which added to its sum of digits gives 201117928.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5008 + ... + 20671.

It is an arithmetic number, because the mean of its divisors is an integer number (13000500).

Almost surely, 2^201117928 is an apocalyptic number.

It is an amenable number.

201117928 is an abundant number, since it is smaller than the sum of its proper divisors (214898072).

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

201117928 is a wasteful number, since it uses less digits than its factorization.

201117928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25785 (or 25781 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 31.

The square root of 201117928 is about 14181.6052687980. The cubic root of 201117928 is about 585.8911375081.

The spelling of 201117928 in words is "two hundred one million, one hundred seventeen thousand, nine hundred twenty-eight".