439621728 has 288 divisors, whose sum is σ = 1475712000. Its totient is φ = 114476544.

The previous prime is 439621711. The next prime is 439621729. The reversal of 439621728 is 827126934.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 439621728.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (439621729) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5564793 + ... + 5564871.

It is an arithmetic number, because the mean of its divisors is an integer number (5124000).

Almost surely, 2^439621728 is an apocalyptic number.

439621728 is a gapful number since it is divisible by the number (48) 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 439621728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (737856000).

439621728 is an abundant number, since it is smaller than the sum of its proper divisors (1036090272).

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

439621728 is a wasteful number, since it uses less digits than its factorization.

439621728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139 (or 104 counting only the distinct ones).

The product of its digits is 145152, while the sum is 42.

The square root of 439621728 is about 20967.1583196198. The cubic root of 439621728 is about 760.3724674742.

The spelling of 439621728 in words is "four hundred thirty-nine million, six hundred twenty-one thousand, seven hundred twenty-eight".