1028604433 has 4 divisors (see below), whose sum is σ = 1053692388. Its totient is φ = 1003516480.

The previous prime is 1028604427. The next prime is 1028604439. The reversal of 1028604433 is 3344068201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3344068201 = 9661 ⋅346141.

It is an interprime number because it is at equal distance from previous prime (1028604427) and next prime (1028604439).

It can be written as a sum of positive squares in 2 ways, for example, as 449143249 + 579461184 = 21193^2 + 24072^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1028604433 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1028604395 and 1028604404.

It is not an unprimeable number, because it can be changed into a prime (1028604439) 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, 12543916 + ... + 12543997.

It is an arithmetic number, because the mean of its divisors is an integer number (263423097).

Almost surely, 2^1028604433 is an apocalyptic number.

It is an amenable number.

1028604433 is a deficient number, since it is larger than the sum of its proper divisors (25087955).

1028604433 is an equidigital number, since it uses as much as digits as its factorization.

1028604433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25087954.

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 1028604433 is about 32071.8635722965. The cubic root of 1028604433 is about 1009.4453161186.

The spelling of 1028604433 in words is "one billion, twenty-eight million, six hundred four thousand, four hundred thirty-three".