1928091 has 8 divisors (see below), whose sum is σ = 2804544. Its totient is φ = 1168520.

The previous prime is 1928071. The next prime is 1928093. The reversal of 1928091 is 1908291.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1928091 - 2⁷ = 1927963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1928093) 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, 29181 + ... + 29246.

It is an arithmetic number, because the mean of its divisors is an integer number (350568).

2^1928091 is an apocalyptic number.

1928091 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1928091 is a deficient number, since it is larger than the sum of its proper divisors (876453).

1928091 is a wasteful number, since it uses less digits than its factorization.

1928091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58441.

The product of its (nonzero) digits is 1296, while the sum is 30.

The square root of 1928091 is about 1388.5571648297. The cubic root of 1928091 is about 124.4636431961.

The spelling of 1928091 in words is "one million, nine hundred twenty-eight thousand, ninety-one".