1128764 has 36 divisors (see below), whose sum is σ = 2480184. Its totient is φ = 445536.

The previous prime is 1128763. The next prime is 1128769. The reversal of 1128764 is 4678211.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1128761) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2327 + ... + 2769.

It is an arithmetic number, because the mean of its divisors is an integer number (68894).

2^1128764 is an apocalyptic number.

1128764 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1128764, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1240092).

1128764 is an abundant number, since it is smaller than the sum of its proper divisors (1351420).

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

1128764 is a wasteful number, since it uses less digits than its factorization.

1128764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474 (or 465 counting only the distinct ones).

The product of its digits is 2688, while the sum is 29.

The square root of 1128764 is about 1062.4330567146. The cubic root of 1128764 is about 104.1200536689.

The spelling of 1128764 in words is "one million, one hundred twenty-eight thousand, seven hundred sixty-four".