1216747084 has 24 divisors (see below), whose sum is σ = 2517409440. Its totient is φ = 503481216.

The previous prime is 1216747079. The next prime is 1216747111. The reversal of 1216747084 is 4807476121.

It is a happy number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 748417 + ... + 750040.

It is an arithmetic number, because the mean of its divisors is an integer number (104892060).

Almost surely, 2^1216747084 is an apocalyptic number.

1216747084 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1216747084 is an abundant number, since it is smaller than the sum of its proper divisors (1300662356).

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

1216747084 is a wasteful number, since it uses less digits than its factorization.

1216747084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1498497 (or 1498495 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 40.

The square root of 1216747084 is about 34881.9019550253. The cubic root of 1216747084 is about 1067.5792024776.

The spelling of 1216747084 in words is "one billion, two hundred sixteen million, seven hundred forty-seven thousand, eighty-four".