1224252816 has 40 divisors (see below), whose sum is σ = 3166237824. Its totient is φ = 407621760.

The previous prime is 1224252791. The next prime is 1224252817. The reversal of 1224252816 is 6182524221.

It is not an unprimeable number, because it can be changed into a prime (1224252817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29730 + ... + 57726.

Almost surely, 2^1224252816 is an apocalyptic number.

1224252816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1224252816 is an abundant number, since it is smaller than the sum of its proper divisors (1941985008).

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

1224252816 is a wasteful number, since it uses less digits than its factorization.

1224252816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28919 (or 28913 counting only the distinct ones).

The product of its digits is 15360, while the sum is 33.

The square root of 1224252816 is about 34989.3243147106. The cubic root of 1224252816 is about 1069.7698914149.

The spelling of 1224252816 in words is "one billion, two hundred twenty-four million, two hundred fifty-two thousand, eight hundred sixteen".