1191828 has 24 divisors (see below), whose sum is σ = 3034080. Its totient is φ = 361120.

The previous prime is 1191821. The next prime is 1191833. The reversal of 1191828 is 8281911.

It is a super-4 number, since 4×1191828⁴ (a number of 25 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1191795 and 1191804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1191821) 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, 4383 + ... + 4646.

It is an arithmetic number, because the mean of its divisors is an integer number (126420).

2^1191828 is an apocalyptic number.

It is an amenable number.

1191828 is an abundant number, since it is smaller than the sum of its proper divisors (1842252).

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

1191828 is a wasteful number, since it uses less digits than its factorization.

1191828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9047 (or 9045 counting only the distinct ones).

The product of its digits is 1152, while the sum is 30.

The square root of 1191828 is about 1091.7087523694. The cubic root of 1191828 is about 106.0240837646.

The spelling of 1191828 in words is "one million, one hundred ninety-one thousand, eight hundred twenty-eight".