1028670864 has 80 divisors (see below), whose sum is σ = 2869649664. Its totient is φ = 315648000.

The previous prime is 1028670859. The next prime is 1028670911. The reversal of 1028670864 is 4680768201.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 248169 + ... + 252279.

Almost surely, 2^1028670864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1028670864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1434824832).

1028670864 is an abundant number, since it is smaller than the sum of its proper divisors (1840978800).

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

1028670864 is a wasteful number, since it uses less digits than its factorization.

1028670864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4536 (or 4530 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 42.

The square root of 1028670864 is about 32072.8992141340. The cubic root of 1028670864 is about 1009.4670468624.

The spelling of 1028670864 in words is "one billion, twenty-eight million, six hundred seventy thousand, eight hundred sixty-four".