1028399074531 has 8 divisors (see below), whose sum is σ = 1050308858880. Its totient is φ = 1006490496648.

The previous prime is 1028399074517. The next prime is 1028399074561. The reversal of 1028399074531 is 1354709938201.

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

It is a cyclic number.

It is not a de Polignac number, because 1028399074531 - 2¹⁵ = 1028399041763 is a prime.

It is a super-2 number, since 2×1028399074531² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1028399074561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1539840 + ... + 2104258.

It is an arithmetic number, because the mean of its divisors is an integer number (131288607360).

Almost surely, 2^{1028399074531} is an apocalyptic number.

1028399074531 is a deficient number, since it is larger than the sum of its proper divisors (21909784349).

1028399074531 is an equidigital number, since it uses as much as digits as its factorization.

1028399074531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 603233.

The product of its (nonzero) digits is 1632960, while the sum is 52.

The spelling of 1028399074531 in words is "one trillion, twenty-eight billion, three hundred ninety-nine million, seventy-four thousand, five hundred thirty-one".