1028665964 has 12 divisors (see below), whose sum is σ = 1814340864. Its totient is φ = 510282864.

The previous prime is 1028665949. The next prime is 1028665969. The reversal of 1028665964 is 4695668201.

It is not an unprimeable number, because it can be changed into a prime (1028665969) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1011959 + ... + 1012974.

It is an arithmetic number, because the mean of its divisors is an integer number (151195072).

Almost surely, 2^1028665964 is an apocalyptic number.

It is an amenable number.

1028665964 is a deficient number, since it is larger than the sum of its proper divisors (785674900).

1028665964 is a wasteful number, since it uses less digits than its factorization.

1028665964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2025064 (or 2025062 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 47.

The square root of 1028665964 is about 32072.8228255637. The cubic root of 1028665964 is about 1009.4654440185.

The spelling of 1028665964 in words is "one billion, twenty-eight million, six hundred sixty-five thousand, nine hundred sixty-four".