439946640 has 480 divisors, whose sum is σ = 1813383936. Its totient is φ = 97044480.

The previous prime is 439946627. The next prime is 439946641. The reversal of 439946640 is 46649934.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (439946641) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 7212210 + ... + 7212270.

Almost surely, 2^439946640 is an apocalyptic number.

439946640 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 439946640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (906691968).

439946640 is an abundant number, since it is smaller than the sum of its proper divisors (1373437296).

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

439946640 is a wasteful number, since it uses less digits than its factorization.

439946640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149 (or 131 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 45.

The square root of 439946640 is about 20974.9050057444. The cubic root of 439946640 is about 760.5597446149.

The spelling of 439946640 in words is "four hundred thirty-nine million, nine hundred forty-six thousand, six hundred forty".