1028743887 has 4 divisors (see below), whose sum is σ = 1371658520. Its totient is φ = 685829256.

The previous prime is 1028743871. The next prime is 1028743901. The reversal of 1028743887 is 7883478201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1028743887 - 2⁴ = 1028743871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1028741887) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 171457312 + ... + 171457317.

It is an arithmetic number, because the mean of its divisors is an integer number (342914630).

Almost surely, 2^1028743887 is an apocalyptic number.

1028743887 is a deficient number, since it is larger than the sum of its proper divisors (342914633).

1028743887 is an equidigital number, since it uses as much as digits as its factorization.

1028743887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342914632.

The product of its (nonzero) digits is 602112, while the sum is 48.

The square root of 1028743887 is about 32074.0375849378. The cubic root of 1028743887 is about 1009.4909328855.

The spelling of 1028743887 in words is "one billion, twenty-eight million, seven hundred forty-three thousand, eight hundred eighty-seven".