1224278616 has 64 divisors (see below), whose sum is σ = 3454099200. Its totient is φ = 358198400.

The previous prime is 1224278611. The next prime is 1224278651. The reversal of 1224278616 is 6168724221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1224278611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72300 + ... + 87611.

It is an arithmetic number, because the mean of its divisors is an integer number (53970300).

Almost surely, 2^1224278616 is an apocalyptic number.

It is an amenable number.

1224278616 is an abundant number, since it is smaller than the sum of its proper divisors (2229820584).

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

1224278616 is a wasteful number, since it uses less digits than its factorization.

1224278616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159960 (or 159956 counting only the distinct ones).

The product of its digits is 64512, while the sum is 39.

The square root of 1224278616 is about 34989.6929966526. The cubic root of 1224278616 is about 1069.7774061670. Note that the first 3 decimals are identical.

The spelling of 1224278616 in words is "one billion, two hundred twenty-four million, two hundred seventy-eight thousand, six hundred sixteen".