1028636434 has 8 divisors (see below), whose sum is σ = 1763376768. Its totient is φ = 440844180.

The previous prime is 1028636423. The next prime is 1028636437. The reversal of 1028636434 is 4346368201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1028636393 and 1028636402.

It is not an unprimeable number, because it can be changed into a prime (1028636437) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 36737002 + ... + 36737029.

It is an arithmetic number, because the mean of its divisors is an integer number (220422096).

Almost surely, 2^1028636434 is an apocalyptic number.

1028636434 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1028636434 is a deficient number, since it is larger than the sum of its proper divisors (734740334).

1028636434 is an equidigital number, since it uses as much as digits as its factorization.

1028636434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73474040.

The product of its (nonzero) digits is 82944, while the sum is 37.

The square root of 1028636434 is about 32072.3624636540. The cubic root of 1028636434 is about 1009.4557843231.

The spelling of 1028636434 in words is "one billion, twenty-eight million, six hundred thirty-six thousand, four hundred thirty-four".