1328440085 has 8 divisors (see below), whose sum is σ = 1821860736. Its totient is φ = 910930320.

The previous prime is 1328440079. The next prime is 1328440109. The reversal of 1328440085 is 5800448231.

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

It is not a de Polignac number, because 1328440085 - 2¹⁰ = 1328439061 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35), and also a Moran number because the ratio is a prime number: 37955431 = 1328440085 / (1 + 3 + 2 + 8 + 4 + 4 + 0 + 0 + 8 + 5).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18977681 + ... + 18977750.

It is an arithmetic number, because the mean of its divisors is an integer number (227732592).

Almost surely, 2^1328440085 is an apocalyptic number.

It is an amenable number.

1328440085 is a deficient number, since it is larger than the sum of its proper divisors (493420651).

1328440085 is an equidigital number, since it uses as much as digits as its factorization.

1328440085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37955443.

The product of its (nonzero) digits is 30720, while the sum is 35.

The square root of 1328440085 is about 36447.7720169560. The cubic root of 1328440085 is about 1099.2943366614.

The spelling of 1328440085 in words is "one billion, three hundred twenty-eight million, four hundred forty thousand, eighty-five".