440406642 has 16 divisors (see below), whose sum is σ = 948568320. Its totient is φ = 135509712.

The previous prime is 440406613. The next prime is 440406647. The reversal of 440406642 is 246604044.

It is not an unprimeable number, because it can be changed into a prime (440406647) 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, 2823042 + ... + 2823197.

It is an arithmetic number, because the mean of its divisors is an integer number (59285520).

Almost surely, 2^440406642 is an apocalyptic number.

440406642 is an abundant number, since it is smaller than the sum of its proper divisors (508161678).

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

440406642 is a wasteful number, since it uses less digits than its factorization.

440406642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5646257.

The product of its (nonzero) digits is 18432, while the sum is 30.

The square root of 440406642 is about 20985.8676732700. The cubic root of 440406642 is about 760.8247291279.

The spelling of 440406642 in words is "four hundred forty million, four hundred six thousand, six hundred forty-two".