1216287846 has 16 divisors (see below), whose sum is σ = 2702862000. Its totient is φ = 405429264.

The previous prime is 1216287799. The next prime is 1216287851. The reversal of 1216287846 is 6487826121.

1216287846 is a `hidden beast` number, since 12 + 1 + 628 + 7 + 8 + 4 + 6 = 666.

It is a super-2 number, since 2×1216287846² = 2958712248654639432, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11261871 + ... + 11261978.

It is an arithmetic number, because the mean of its divisors is an integer number (168928875).

Almost surely, 2^1216287846 is an apocalyptic number.

1216287846 is an abundant number, since it is smaller than the sum of its proper divisors (1486574154).

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

1216287846 is a wasteful number, since it uses less digits than its factorization.

1216287846 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22523860 (or 22523854 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 1216287846 is about 34875.3185791901. The cubic root of 1216287846 is about 1067.4448731009. Note that the first 3 decimals are identical.

The spelling of 1216287846 in words is "one billion, two hundred sixteen million, two hundred eighty-seven thousand, eight hundred forty-six".