1028729136 has 40 divisors (see below), whose sum is σ = 2661526080. Its totient is φ = 342396736.

The previous prime is 1028729129. The next prime is 1028729147. The reversal of 1028729136 is 6319278201.

It is a junction number, because it is equal to n+sod(n) for n = 1028729094 and 1028729103.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17095 + ... + 48473.

It is an arithmetic number, because the mean of its divisors is an integer number (66538152).

Almost surely, 2^1028729136 is an apocalyptic number.

1028729136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1028729136 is an abundant number, since it is smaller than the sum of its proper divisors (1632796944).

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

1028729136 is a wasteful number, since it uses less digits than its factorization.

1028729136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32073 (or 32067 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 1028729136 is about 32073.8076317733. The cubic root of 1028729136 is about 1009.4861078841.

The spelling of 1028729136 in words is "one billion, twenty-eight million, seven hundred twenty-nine thousand, one hundred thirty-six".