1198022391 has 12 divisors (see below), whose sum is σ = 1737906768. Its totient is φ = 795252384.

The previous prime is 1198022383. The next prime is 1198022407. The reversal of 1198022391 is 1932208911.

It is not a de Polignac number, because 1198022391 - 2³ = 1198022383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1198022191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 283555 + ... + 287748.

It is an arithmetic number, because the mean of its divisors is an integer number (144825564).

Almost surely, 2^1198022391 is an apocalyptic number.

1198022391 is a deficient number, since it is larger than the sum of its proper divisors (539884377).

1198022391 is a wasteful number, since it uses less digits than its factorization.

1198022391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 571542 (or 571539 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The square root of 1198022391 is about 34612.4600541481. The cubic root of 1198022391 is about 1062.0744917797.

The spelling of 1198022391 in words is "one billion, one hundred ninety-eight million, twenty-two thousand, three hundred ninety-one".