1216669296 has 20 divisors (see below), whose sum is σ = 3143062472. Its totient is φ = 405556416.

The previous prime is 1216669291. The next prime is 1216669303. The reversal of 1216669296 is 6929666121.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 25347277 = 1216669296 / (1 + 2 + 1 + 6 + 6 + 6 + 9 + 2 + 9 + 6).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216669291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12673591 + ... + 12673686.

Almost surely, 2^1216669296 is an apocalyptic number.

1216669296 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1216669296 is an abundant number, since it is smaller than the sum of its proper divisors (1926393176).

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

1216669296 is a wasteful number, since it uses less digits than its factorization.

1216669296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25347288 (or 25347282 counting only the distinct ones).

The product of its digits is 419904, while the sum is 48.

The square root of 1216669296 is about 34880.7869177288. The cubic root of 1216669296 is about 1067.5564514825.

The spelling of 1216669296 in words is "one billion, two hundred sixteen million, six hundred sixty-nine thousand, two hundred ninety-six".