1212194680 has 96 divisors (see below), whose sum is σ = 2905597440. Its totient is φ = 455051520.

The previous prime is 1212194677. The next prime is 1212194681. The reversal of 1212194680 is 864912121.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212194681) 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 23 ways as a sum of consecutive naturals, for example, 1833550 + ... + 1834210.

It is an arithmetic number, because the mean of its divisors is an integer number (30266640).

Almost surely, 2^1212194680 is an apocalyptic number.

1212194680 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 1212194680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1452798720).

1212194680 is an abundant number, since it is smaller than the sum of its proper divisors (1693402760).

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

1212194680 is a wasteful number, since it uses less digits than its factorization.

1212194680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 837 (or 814 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 1212194680 is about 34816.5862772329. The cubic root of 1212194680 is about 1066.2461054719.

The spelling of 1212194680 in words is "one billion, two hundred twelve million, one hundred ninety-four thousand, six hundred eighty".