328285777987 has 4 divisors (see below), whose sum is σ = 328868879400. Its totient is φ = 327702676576.

The previous prime is 328285777973. The next prime is 328285778003. The reversal of 328285777987 is 789777582823.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 789777582823 = 6607 ⋅119536489.

It is a cyclic number.

It is not a de Polignac number, because 328285777987 - 2²⁷ = 328151560259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (328285777907) 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, 291549862 + ... + 291550987.

It is an arithmetic number, because the mean of its divisors is an integer number (82217219850).

Almost surely, 2^328285777987 is an apocalyptic number.

328285777987 is a deficient number, since it is larger than the sum of its proper divisors (583101413).

328285777987 is an equidigital number, since it uses as much as digits as its factorization.

328285777987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 583101412.

The product of its digits is 663828480, while the sum is 73.

The spelling of 328285777987 in words is "three hundred twenty-eight billion, two hundred eighty-five million, seven hundred seventy-seven thousand, nine hundred eighty-seven".