1216285928790 has 32 divisors (see below), whose sum is σ = 2997980454240. Its totient is φ = 315576889344.

The previous prime is 1216285928633. The next prime is 1216285928797. The reversal of 1216285928790 is 978295826121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216285928797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 547875435 + ... + 547877654.

It is an arithmetic number, because the mean of its divisors is an integer number (93686889195).

Almost surely, 2^{1216285928790} is an apocalyptic number.

1216285928790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1216285928790 is an abundant number, since it is smaller than the sum of its proper divisors (1781694525450).

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

1216285928790 is a wasteful number, since it uses less digits than its factorization.

1216285928790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1095753136.

The product of its (nonzero) digits is 8709120, while the sum is 60.

The spelling of 1216285928790 in words is "one trillion, two hundred sixteen billion, two hundred eighty-five million, nine hundred twenty-eight thousand, seven hundred ninety".