1091930 has 32 divisors (see below), whose sum is σ = 2367360. Its totient is φ = 354240.

The previous prime is 1091917. The next prime is 1091939. The reversal of 1091930 is 391901.

It is a super-2 number, since 2×1091930² = 2384622249800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1091896 and 1091905.

It is not an unprimeable number, because it can be changed into a prime (1091939) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 920 + ... + 1740.

It is an arithmetic number, because the mean of its divisors is an integer number (73980).

2^1091930 is an apocalyptic number.

1091930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1091930 is an abundant number, since it is smaller than the sum of its proper divisors (1275430).

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

1091930 is a wasteful number, since it uses less digits than its factorization.

1091930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 854.

The product of its (nonzero) digits is 243, while the sum is 23.

The square root of 1091930 is about 1044.9545444659. The cubic root of 1091930 is about 102.9749522780.

The spelling of 1091930 in words is "one million, ninety-one thousand, nine hundred thirty".