328778131 has 8 divisors (see below), whose sum is σ = 358946928. Its totient is φ = 298656000.

The previous prime is 328778111. The next prime is 328778137. The reversal of 328778131 is 131877823.

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 328778131 - 2⁷ = 328778003 is a prime.

It is a super-2 number, since 2×328778131² = 216190118847706322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (328778137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3991 + ... + 25951.

It is an arithmetic number, because the mean of its divisors is an integer number (44868366).

Almost surely, 2^328778131 is an apocalyptic number.

328778131 is a deficient number, since it is larger than the sum of its proper divisors (30168797).

328778131 is a wasteful number, since it uses less digits than its factorization.

328778131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23333.

The product of its digits is 56448, while the sum is 40.

The square root of 328778131 is about 18132.2400987854. The cubic root of 328778131 is about 690.1883760682.

It can be divided in two parts, 3287 and 78131, that added together give a palindrome (81418).

The spelling of 328778131 in words is "three hundred twenty-eight million, seven hundred seventy-eight thousand, one hundred thirty-one".