328789440 has 336 divisors, whose sum is σ = 1323758592. Its totient is φ = 73340928.

The previous prime is 328789423. The next prime is 328789499. The reversal of 328789440 is 44987823.

It is a tau number, because it is divible by the number of its divisors (336).

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

It is a congruent number.

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, 947347 + ... + 947693.

Almost surely, 2^328789440 is an apocalyptic number.

328789440 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 328789440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (661879296).

328789440 is an abundant number, since it is smaller than the sum of its proper divisors (994969152).

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

328789440 is a wasteful number, since it uses less digits than its factorization.

328789440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424 (or 411 counting only the distinct ones).

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

The square root of 328789440 is about 18132.5519439488. The cubic root of 328789440 is about 690.1962894604.

The spelling of 328789440 in words is "three hundred twenty-eight million, seven hundred eighty-nine thousand, four hundred forty".