1091488 has 24 divisors (see below), whose sum is σ = 2243808. Its totient is φ = 521664.

The previous prime is 1091477. The next prime is 1091509. The reversal of 1091488 is 8841901.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

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, 6 + ... + 1477.

It is an arithmetic number, because the mean of its divisors is an integer number (93492).

2^1091488 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1091488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1121904).

1091488 is an abundant number, since it is smaller than the sum of its proper divisors (1152320).

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

1091488 is a wasteful number, since it uses less digits than its factorization.

1091488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1516 (or 1508 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 1091488 is about 1044.7430306061. The cubic root of 1091488 is about 102.9610560662.

The spelling of 1091488 in words is "one million, ninety-one thousand, four hundred eighty-eight".