1216887350 has 24 divisors (see below), whose sum is σ = 2586755568. Its totient is φ = 417218400.

The previous prime is 1216887349. The next prime is 1216887359. The reversal of 1216887350 is 537886121.

It is a junction number, because it is equal to n+sod(n) for n = 1216887298 and 1216887307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216887359) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1738061 + ... + 1738760.

It is an arithmetic number, because the mean of its divisors is an integer number (107781482).

Almost surely, 2^1216887350 is an apocalyptic number.

1216887350 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1216887350 is an abundant number, since it is smaller than the sum of its proper divisors (1369868218).

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

1216887350 is a wasteful number, since it uses less digits than its factorization.

1216887350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3476840 (or 3476835 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 41.

The square root of 1216887350 is about 34883.9124812570. The cubic root of 1216887350 is about 1067.6202242349.

The spelling of 1216887350 in words is "one billion, two hundred sixteen million, eight hundred eighty-seven thousand, three hundred fifty".