328677281478 has 576 divisors, whose sum is σ = 993832519680. Its totient is φ = 77393885184.

The previous prime is 328677281447. The next prime is 328677281483. The reversal of 328677281478 is 874182776823.

It is a happy number.

328677281478 is a `hidden beast` number, since 3 + 2 + 86 + 7 + 7 + 2 + 81 + 478 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 748695183 + ... + 748695621.

It is an arithmetic number, because the mean of its divisors is an integer number (1725403680).

Almost surely, 2^328677281478 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 328677281478, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (496916259840).

328677281478 is an abundant number, since it is smaller than the sum of its proper divisors (665155238202).

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

328677281478 is a wasteful number, since it uses less digits than its factorization.

328677281478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681 (or 671 counting only the distinct ones).

The product of its digits is 50577408, while the sum is 63.

The spelling of 328677281478 in words is "three hundred twenty-eight billion, six hundred seventy-seven million, two hundred eighty-one thousand, four hundred seventy-eight".