1028909312 has 18 divisors (see below), whose sum is σ = 2053799958. Its totient is φ = 514454528.

The previous prime is 1028909291. The next prime is 1028909317. The reversal of 1028909312 is 2139098201.

It can be written as a sum of positive squares in only one way, i.e., 736362496 + 292546816 = 27136^2 + 17104^2 .

It is not an unprimeable number, because it can be changed into a prime (1028909317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2009333 + ... + 2009844.

Almost surely, 2^1028909312 is an apocalyptic number.

It is an amenable number.

1028909312 is a deficient number, since it is larger than the sum of its proper divisors (1024890646).

1028909312 is an frugal number, since it uses more digits than its factorization.

1028909312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4019193 (or 4019179 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 1028909312 is about 32076.6162803997. The cubic root of 1028909312 is about 1009.5450396751.

The spelling of 1028909312 in words is "one billion, twenty-eight million, nine hundred nine thousand, three hundred twelve".