328497840 has 480 divisors, whose sum is σ = 1323129600. Its totient is φ = 72161280.

The previous prime is 328497833. The next prime is 328497853. The reversal of 328497840 is 48794823.

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 95 ways as a sum of consecutive naturals, for example, 5567731 + ... + 5567789.

It is an arithmetic number, because the mean of its divisors is an integer number (2756520).

Almost surely, 2^328497840 is an apocalyptic number.

328497840 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 328497840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (661564800).

328497840 is an abundant number, since it is smaller than the sum of its proper divisors (994631760).

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

328497840 is a wasteful number, since it uses less digits than its factorization.

328497840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145 (or 136 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The square root of 328497840 is about 18124.5093726699. The cubic root of 328497840 is about 689.9921864270.

It can be divided in two parts, 3284 and 97840, that added together give a square (101124 = 318²).

The spelling of 328497840 in words is "three hundred twenty-eight million, four hundred ninety-seven thousand, eight hundred forty".