1091928 has 16 divisors (see below), whose sum is σ = 2729880. Its totient is φ = 363968.

The previous prime is 1091917. The next prime is 1091939. The reversal of 1091928 is 8291901.

It is an interprime number because it is at equal distance from previous prime (1091917) and next prime (1091939).

It is a junction number, because it is equal to n+sod(n) for n = 1091895 and 1091904.

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, 22725 + ... + 22772.

2^1091928 is an apocalyptic number.

It is an amenable number.

1091928 is an abundant number, since it is smaller than the sum of its proper divisors (1637952).

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

1091928 is a wasteful number, since it uses less digits than its factorization.

1091928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45506 (or 45502 counting only the distinct ones).

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

The square root of 1091928 is about 1044.9535874861. The cubic root of 1091928 is about 102.9748894077.

The spelling of 1091928 in words is "one million, ninety-one thousand, nine hundred twenty-eight".