1199213680 has 80 divisors (see below), whose sum is σ = 3226936320. Its totient is φ = 405939456.

The previous prime is 1199213651. The next prime is 1199213681. The reversal of 1199213680 is 863129911.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×1199213680² = 2876226900598284800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1199213681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30687 + ... + 57793.

It is an arithmetic number, because the mean of its divisors is an integer number (40336704).

Almost surely, 2^1199213680 is an apocalyptic number.

1199213680 is a gapful number since it is divisible by the number (10) 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 1199213680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1613468160).

1199213680 is an abundant number, since it is smaller than the sum of its proper divisors (2027722640).

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

1199213680 is a wasteful number, since it uses less digits than its factorization.

1199213680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27206 (or 27200 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 40.

The square root of 1199213680 is about 34629.6647399307. The cubic root of 1199213680 is about 1062.4264102204.

The spelling of 1199213680 in words is "one billion, one hundred ninety-nine million, two hundred thirteen thousand, six hundred eighty".