1216836368 has 40 divisors (see below), whose sum is σ = 2604535680. Its totient is φ = 546099840.

The previous prime is 1216836349. The next prime is 1216836373. The reversal of 1216836368 is 8636386121.

It is a Harshad number since it is a multiple of its sum of digits (44).

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, 29855 + ... + 57662.

It is an arithmetic number, because the mean of its divisors is an integer number (65113392).

Almost surely, 2^1216836368 is an apocalyptic number.

It is an amenable number.

1216836368 is an abundant number, since it is smaller than the sum of its proper divisors (1387699312).

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

1216836368 is a wasteful number, since it uses less digits than its factorization.

1216836368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87615 (or 87609 counting only the distinct ones).

The product of its digits is 248832, while the sum is 44.

The square root of 1216836368 is about 34883.1817356158. The cubic root of 1216836368 is about 1067.6053145627.

The spelling of 1216836368 in words is "one billion, two hundred sixteen million, eight hundred thirty-six thousand, three hundred sixty-eight".