1191283548 has 48 divisors (see below), whose sum is σ = 3421125120. Its totient is φ = 314184384.

The previous prime is 1191283493. The next prime is 1191283549. The reversal of 1191283548 is 8453821911.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1191283549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 544368 + ... + 546551.

It is an arithmetic number, because the mean of its divisors is an integer number (71273440).

Almost surely, 2^1191283548 is an apocalyptic number.

It is an amenable number.

1191283548 is an abundant number, since it is smaller than the sum of its proper divisors (2229841572).

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

1191283548 is a wasteful number, since it uses less digits than its factorization.

1191283548 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1090946 (or 1090944 counting only the distinct ones).

The product of its digits is 69120, while the sum is 42.

The square root of 1191283548 is about 34514.9757062061. The cubic root of 1191283548 is about 1060.0793663132.

The spelling of 1191283548 in words is "one billion, one hundred ninety-one million, two hundred eighty-three thousand, five hundred forty-eight".