1191802440 has 64 divisors (see below), whose sum is σ = 3690754560. Its totient is φ = 307560960.

The previous prime is 1191802427. The next prime is 1191802441. The reversal of 1191802440 is 442081911.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1191802398 and 1191802407.

It is not an unprimeable number, because it can be changed into a prime (1191802441) 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, 156469 + ... + 163908.

It is an arithmetic number, because the mean of its divisors is an integer number (57668040).

Almost surely, 2^1191802440 is an apocalyptic number.

1191802440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1191802440 is an abundant number, since it is smaller than the sum of its proper divisors (2498952120).

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

1191802440 is a wasteful number, since it uses less digits than its factorization.

1191802440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320422 (or 320418 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 1191802440 is about 34522.4917988259. The cubic root of 1191802440 is about 1060.2332582667.

The spelling of 1191802440 in words is "one billion, one hundred ninety-one million, eight hundred two thousand, four hundred forty".