1228981516 has 48 divisors (see below), whose sum is σ = 2485046592. Its totient is φ = 520934400.

The previous prime is 1228981489. The next prime is 1228981531. The reversal of 1228981516 is 6151898221.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1614576 + ... + 1615336.

It is an arithmetic number, because the mean of its divisors is an integer number (51771804).

Almost surely, 2^1228981516 is an apocalyptic number.

It is an amenable number.

1228981516 is an abundant number, since it is smaller than the sum of its proper divisors (1256065076).

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

1228981516 is a wasteful number, since it uses less digits than its factorization.

1228981516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1330 (or 1328 counting only the distinct ones).

The product of its digits is 69120, while the sum is 43.

The square root of 1228981516 is about 35056.8326578429. The cubic root of 1228981516 is about 1071.1454574616.

The spelling of 1228981516 in words is "one billion, two hundred twenty-eight million, nine hundred eighty-one thousand, five hundred sixteen".