439342640 has 40 divisors (see below), whose sum is σ = 1114334928. Its totient is φ = 159760640.

The previous prime is 439342639. The next prime is 439342649. The reversal of 439342640 is 46243934.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 439342640.

It is not an unprimeable number, because it can be changed into a prime (439342649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 248747 + ... + 250506.

Almost surely, 2^439342640 is an apocalyptic number.

439342640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

439342640 is an abundant number, since it is smaller than the sum of its proper divisors (674992288).

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

439342640 is a wasteful number, since it uses less digits than its factorization.

439342640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499277 (or 499271 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 35.

The square root of 439342640 is about 20960.5019023877. The cubic root of 439342640 is about 760.2115293010.

The spelling of 439342640 in words is "four hundred thirty-nine million, three hundred forty-two thousand, six hundred forty".