1228908672 has 80 divisors (see below), whose sum is σ = 3657243150. Its totient is φ = 409632768.

The previous prime is 1228908661. The next prime is 1228908677. The reversal of 1228908672 is 2768098221.

It can be written as a sum of positive squares in only one way, i.e., 1035809856 + 193098816 = 32184^2 + 13896^2 .

It is not an unprimeable number, because it can be changed into a prime (1228908677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 48897 + ... + 69632.

Almost surely, 2^1228908672 is an apocalyptic number.

1228908672 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1228908672 is an abundant number, since it is smaller than the sum of its proper divisors (2428334478).

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

1228908672 is an equidigital number, since it uses as much as digits as its factorization.

1228908672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118555 (or 118534 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The square root of 1228908672 is about 35055.7937008991. The cubic root of 1228908672 is about 1071.1242941215.

The spelling of 1228908672 in words is "one billion, two hundred twenty-eight million, nine hundred eight thousand, six hundred seventy-two".