328877640 has 192 divisors, whose sum is σ = 1315641600. Its totient is φ = 69382656.

The previous prime is 328877639. The next prime is 328877677. The reversal of 328877640 is 46778823.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 27741 + ... + 37779.

It is an arithmetic number, because the mean of its divisors is an integer number (6852300).

Almost surely, 2^328877640 is an apocalyptic number.

328877640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 328877640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (657820800).

328877640 is an abundant number, since it is smaller than the sum of its proper divisors (986763960).

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

328877640 is a wasteful number, since it uses less digits than its factorization.

328877640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10076 (or 10069 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 45.

The square root of 328877640 is about 18134.9838709606. The cubic root of 328877640 is about 690.2580005564.

The spelling of 328877640 in words is "three hundred twenty-eight million, eight hundred seventy-seven thousand, six hundred forty".