201091928 has 8 divisors (see below), whose sum is σ = 377047380. Its totient is φ = 100545960.

The previous prime is 201091907. The next prime is 201091937. The reversal of 201091928 is 829190102.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 201091894 and 201091903.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12568238 + ... + 12568253.

Almost surely, 2^201091928 is an apocalyptic number.

It is an amenable number.

201091928 is a deficient number, since it is larger than the sum of its proper divisors (175955452).

201091928 is a wasteful number, since it uses less digits than its factorization.

201091928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25136497 (or 25136493 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 201091928 is about 14180.6885587407. The cubic root of 201091928 is about 585.8658889284.

The spelling of 201091928 in words is "two hundred one million, ninety-one thousand, nine hundred twenty-eight".