328643777 has 16 divisors (see below), whose sum is σ = 415859712. Its totient is φ = 252259920.

The previous prime is 328643773. The next prime is 328643789. The reversal of 328643777 is 777346823.

It is not a de Polignac number, because 328643777 - 2² = 328643773 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (328643773) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26693 + ... + 37010.

It is an arithmetic number, because the mean of its divisors is an integer number (25991232).

Almost surely, 2^328643777 is an apocalyptic number.

It is an amenable number.

328643777 is a deficient number, since it is larger than the sum of its proper divisors (87215935).

328643777 is a wasteful number, since it uses less digits than its factorization.

328643777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63788.

The product of its digits is 1185408, while the sum is 47.

The square root of 328643777 is about 18128.5348828856. The cubic root of 328643777 is about 690.0943489271.

The spelling of 328643777 in words is "three hundred twenty-eight million, six hundred forty-three thousand, seven hundred seventy-seven".