328527778420 has 12 divisors (see below), whose sum is σ = 689908334724. Its totient is φ = 131411111360.

The previous prime is 328527778391. The next prime is 328527778421. The reversal of 328527778420 is 24877725823.

It can be written as a sum of positive squares in 2 ways, for example, as 228294751204 + 100233027216 = 477802^2 + 316596^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (328527778421) 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, 8213194441 + ... + 8213194480.

It is an arithmetic number, because the mean of its divisors is an integer number (57492361227).

Almost surely, 2^328527778420 is an apocalyptic number.

It is an amenable number.

328527778420 is an abundant number, since it is smaller than the sum of its proper divisors (361380556304).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

328527778420 is a wasteful number, since it uses less digits than its factorization.

328527778420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16426388930 (or 16426388928 counting only the distinct ones).

The product of its (nonzero) digits is 10536960, while the sum is 55.

The spelling of 328527778420 in words is "three hundred twenty-eight billion, five hundred twenty-seven million, seven hundred seventy-eight thousand, four hundred twenty".