1228885616 has 60 divisors (see below), whose sum is σ = 2750685552. Its totient is φ = 520973568.

The previous prime is 1228885549. The next prime is 1228885627. The reversal of 1228885616 is 6165888221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4342211 + ... + 4342493.

Almost surely, 2^1228885616 is an apocalyptic number.

1228885616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1228885616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1375342776).

1228885616 is an abundant number, since it is smaller than the sum of its proper divisors (1521799936).

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

1228885616 is an equidigital number, since it uses as much as digits as its factorization.

1228885616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718 (or 429 counting only the distinct ones).

The product of its digits is 368640, while the sum is 47.

The square root of 1228885616 is about 35055.4648521454. The cubic root of 1228885616 is about 1071.1175954962.

The spelling of 1228885616 in words is "one billion, two hundred twenty-eight million, eight hundred eighty-five thousand, six hundred sixteen".