1211674680 has 128 divisors (see below), whose sum is σ = 4169318400. Its totient is φ = 312681600.

The previous prime is 1211674663. The next prime is 1211674687. The reversal of 1211674680 is 864761121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211674687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15385 + ... + 51575.

It is an arithmetic number, because the mean of its divisors is an integer number (32572800).

Almost surely, 2^1211674680 is an apocalyptic number.

1211674680 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 1211674680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2084659200).

1211674680 is an abundant number, since it is smaller than the sum of its proper divisors (2957643720).

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

1211674680 is a wasteful number, since it uses less digits than its factorization.

1211674680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36242 (or 36232 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 1211674680 is about 34809.1177710668. The cubic root of 1211674680 is about 1066.0936197136.

The spelling of 1211674680 in words is "one billion, two hundred eleven million, six hundred seventy-four thousand, six hundred eighty".