1228916904 has 16 divisors (see below), whose sum is σ = 3072292320. Its totient is φ = 409638960.

The previous prime is 1228916891. The next prime is 1228916917. The reversal of 1228916904 is 4096198221.

It is an interprime number because it is at equal distance from previous prime (1228916891) and next prime (1228916917).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25602412 + ... + 25602459.

It is an arithmetic number, because the mean of its divisors is an integer number (192018270).

Almost surely, 2^1228916904 is an apocalyptic number.

It is an amenable number.

1228916904 is an abundant number, since it is smaller than the sum of its proper divisors (1843375416).

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

1228916904 is a wasteful number, since it uses less digits than its factorization.

1228916904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51204880 (or 51204876 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 1228916904 is about 35055.9111135340. The cubic root of 1228916904 is about 1071.1266858033.

It can be divided in two parts, 122891 and 6904, that added together give a triangular number (129795 = T₅₀₉).

The spelling of 1228916904 in words is "one billion, two hundred twenty-eight million, nine hundred sixteen thousand, nine hundred four".