1216938486 has 16 divisors (see below), whose sum is σ = 2561976000. Its totient is φ = 384296328.

The previous prime is 1216938479. The next prime is 1216938493. The reversal of 1216938486 is 6848396121.

It is an interprime number because it is at equal distance from previous prime (1216938479) and next prime (1216938493).

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, 5337336 + ... + 5337563.

It is an arithmetic number, because the mean of its divisors is an integer number (160123500).

Almost surely, 2^1216938486 is an apocalyptic number.

1216938486 is an abundant number, since it is smaller than the sum of its proper divisors (1345037514).

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

1216938486 is a wasteful number, since it uses less digits than its factorization.

1216938486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10674923.

The product of its digits is 497664, while the sum is 48.

The square root of 1216938486 is about 34884.6454188659. The cubic root of 1216938486 is about 1067.6351785260.

The spelling of 1216938486 in words is "one billion, two hundred sixteen million, nine hundred thirty-eight thousand, four hundred eighty-six".