1028128351 has 4 divisors (see below), whose sum is σ = 1042609104. Its totient is φ = 1013647600.

The previous prime is 1028128307. The next prime is 1028128391. The reversal of 1028128351 is 1538218201.

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

It is a cyclic number.

It is not a de Polignac number, because 1028128351 - 2⁷ = 1028128223 is a prime.

It is a super-2 number, since 2×1028128351² = 2114095812259958402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1028128391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7240270 + ... + 7240411.

It is an arithmetic number, because the mean of its divisors is an integer number (260652276).

Almost surely, 2^1028128351 is an apocalyptic number.

1028128351 is a deficient number, since it is larger than the sum of its proper divisors (14480753).

1028128351 is an equidigital number, since it uses as much as digits as its factorization.

1028128351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14480752.

The product of its (nonzero) digits is 3840, while the sum is 31.

The square root of 1028128351 is about 32064.4406001415. The cubic root of 1028128351 is about 1009.2895539705.

The spelling of 1028128351 in words is "one billion, twenty-eight million, one hundred twenty-eight thousand, three hundred fifty-one".