1213784676 has 240 divisors, whose sum is σ = 3728155200. Its totient is φ = 340962048.

The previous prime is 1213784653. The next prime is 1213784687. The reversal of 1213784676 is 6764873121.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 2320551 + ... + 2321073.

It is an arithmetic number, because the mean of its divisors is an integer number (15533980).

Almost surely, 2^1213784676 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1213784676, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1864077600).

1213784676 is an abundant number, since it is smaller than the sum of its proper divisors (2514370524).

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

1213784676 is a wasteful number, since it uses less digits than its factorization.

1213784676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 600 (or 589 counting only the distinct ones).

The product of its digits is 338688, while the sum is 45.

The square root of 1213784676 is about 34839.4126816168. The cubic root of 1213784676 is about 1066.7120884738.

The spelling of 1213784676 in words is "one billion, two hundred thirteen million, seven hundred eighty-four thousand, six hundred seventy-six".