2091928 has 16 divisors (see below), whose sum is σ = 3960000. Its totient is φ = 1035936.

The previous prime is 2091917. The next prime is 2091931. The reversal of 2091928 is 8291902.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 2091928.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 328 + ... + 2071.

It is an arithmetic number, because the mean of its divisors is an integer number (247500).

2^2091928 is an apocalyptic number.

It is an amenable number.

2091928 is a deficient number, since it is larger than the sum of its proper divisors (1868072).

2091928 is a wasteful number, since it uses less digits than its factorization.

2091928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2514 (or 2510 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 2091928 is about 1446.3498885125. The cubic root of 2091928 is about 127.8936290757.

The spelling of 2091928 in words is "two million, ninety-one thousand, nine hundred twenty-eight".