1198311942 has 8 divisors (see below), whose sum is σ = 2396623896. Its totient is φ = 399437312.

The previous prime is 1198311857. The next prime is 1198311949. The reversal of 1198311942 is 2491138911.

It is a sphenic number, since it is the product of 3 distinct primes.

1198311942 is an admirable number.

It is a super-2 number, since 2×1198311942² = 2871903020679622728, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1198311942.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1198311949) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99859323 + ... + 99859334.

It is an arithmetic number, because the mean of its divisors is an integer number (299577987).

Almost surely, 2^1198311942 is an apocalyptic number.

1198311942 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1198311942 is a wasteful number, since it uses less digits than its factorization.

1198311942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199718662.

The product of its digits is 15552, while the sum is 39.

The square root of 1198311942 is about 34616.6425581685. The cubic root of 1198311942 is about 1062.1600494347.

The spelling of 1198311942 in words is "one billion, one hundred ninety-eight million, three hundred eleven thousand, nine hundred forty-two".