440907138 has 80 divisors (see below), whose sum is σ = 1195565184. Its totient is φ = 118558080.

The previous prime is 440907113. The next prime is 440907151. The reversal of 440907138 is 831709044.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 7843 + ... + 30713.

Almost surely, 2^440907138 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 440907138, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (597782592).

440907138 is an abundant number, since it is smaller than the sum of its proper divisors (754658046).

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

440907138 is a wasteful number, since it uses less digits than its factorization.

440907138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22909 (or 22900 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 440907138 is about 20997.7888835944. The cubic root of 440907138 is about 761.1128307292.

The spelling of 440907138 in words is "four hundred forty million, nine hundred seven thousand, one hundred thirty-eight".