1028731968 has 112 divisors (see below), whose sum is σ = 3299277120. Its totient is φ = 311731200.

The previous prime is 1028731927. The next prime is 1028731969. The reversal of 1028731968 is 8691378201.

It is not an unprimeable number, because it can be changed into a prime (1028731969) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8053 + ... + 46068.

Almost surely, 2^1028731968 is an apocalyptic number.

1028731968 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1028731968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1649638560).

1028731968 is an abundant number, since it is smaller than the sum of its proper divisors (2270545152).

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

1028731968 is a wasteful number, since it uses less digits than its factorization.

1028731968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54153 (or 54137 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 1028731968 is about 32073.8517799157. The cubic root of 1028731968 is about 1009.4870342252.

The spelling of 1028731968 in words is "one billion, twenty-eight million, seven hundred thirty-one thousand, nine hundred sixty-eight".