1028791288 has 32 divisors (see below), whose sum is σ = 2300405760. Its totient is φ = 421740000.

The previous prime is 1028791277. The next prime is 1028791333. The reversal of 1028791288 is 8821978201.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 398088 + ... + 400663.

It is an arithmetic number, because the mean of its divisors is an integer number (71887680).

Almost surely, 2^1028791288 is an apocalyptic number.

It is an amenable number.

1028791288 is an abundant number, since it is smaller than the sum of its proper divisors (1271614472).

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

1028791288 is a wasteful number, since it uses less digits than its factorization.

1028791288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 798787 (or 798783 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 46.

The square root of 1028791288 is about 32074.7765074053. The cubic root of 1028791288 is about 1009.5064372773.

The spelling of 1028791288 in words is "one billion, twenty-eight million, seven hundred ninety-one thousand, two hundred eighty-eight".