1028388770 has 32 divisors (see below), whose sum is σ = 1889568000. Its totient is φ = 402894976.

The previous prime is 1028388743. The next prime is 1028388791. The reversal of 1028388770 is 778838201.

It is a super-2 number, since 2×1028388770² = 2115166924524225800, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89831 + ... + 100629.

It is an arithmetic number, because the mean of its divisors is an integer number (59049000).

Almost surely, 2^1028388770 is an apocalyptic number.

1028388770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1028388770 is a deficient number, since it is larger than the sum of its proper divisors (861179230).

1028388770 is a wasteful number, since it uses less digits than its factorization.

1028388770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11002.

The product of its (nonzero) digits is 150528, while the sum is 44.

The square root of 1028388770 is about 32068.5012122488. The cubic root of 1028388770 is about 1009.3747625236.

The spelling of 1028388770 in words is "one billion, twenty-eight million, three hundred eighty-eight thousand, seven hundred seventy".