1228668516 has 72 divisors (see below), whose sum is σ = 3274689600. Its totient is φ = 387357120.

The previous prime is 1228668479. The next prime is 1228668547. The reversal of 1228668516 is 6158668221.

1228668516 is a `hidden beast` number, since 122 + 8 + 6 + 6 + 8 + 516 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 572806 + ... + 574946.

It is an arithmetic number, because the mean of its divisors is an integer number (45481800).

Almost surely, 2^1228668516 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1228668516, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1637344800).

1228668516 is an abundant number, since it is smaller than the sum of its proper divisors (2046021084).

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

1228668516 is a wasteful number, since it uses less digits than its factorization.

1228668516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3009 (or 3004 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The square root of 1228668516 is about 35052.3681938896. The cubic root of 1228668516 is about 1071.0545157644.

The spelling of 1228668516 in words is "one billion, two hundred twenty-eight million, six hundred sixty-eight thousand, five hundred sixteen".