1198683864 has 144 divisors (see below), whose sum is σ = 3857349600. Its totient is φ = 335147904.

The previous prime is 1198683833. The next prime is 1198683869. The reversal of 1198683864 is 4683868911.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 1198683864.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1198683869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 162202 + ... + 169430.

It is an arithmetic number, because the mean of its divisors is an integer number (26787150).

Almost surely, 2^1198683864 is an apocalyptic number.

1198683864 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1198683864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1928674800).

1198683864 is an abundant number, since it is smaller than the sum of its proper divisors (2658665736).

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

1198683864 is a wasteful number, since it uses less digits than its factorization.

1198683864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7302 (or 7288 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 54.

The square root of 1198683864 is about 34622.0141528479. The cubic root of 1198683864 is about 1062.2699261742.

The spelling of 1198683864 in words is "one billion, one hundred ninety-eight million, six hundred eighty-three thousand, eight hundred sixty-four".