439982640 has 180 divisors, whose sum is σ = 1551369456. Its totient is φ = 111538944.

The previous prime is 439982633. The next prime is 439982657. The reversal of 439982640 is 46289934.

It is a tau number, because it is divible by the number of its divisors (180).

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2699199 + ... + 2699361.

Almost surely, 2^439982640 is an apocalyptic number.

439982640 is a gapful number since it is divisible by the number (40) 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 439982640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (775684728).

439982640 is an abundant number, since it is smaller than the sum of its proper divisors (1111386816).

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

439982640 is a wasteful number, since it uses less digits than its factorization.

439982640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368 (or 196 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The square root of 439982640 is about 20975.7631565576. The cubic root of 439982640 is about 760.5804891033.

The spelling of 439982640 in words is "four hundred thirty-nine million, nine hundred eighty-two thousand, six hundred forty".