440680138 has 16 divisors (see below), whose sum is σ = 708405120. Its totient is φ = 205063056.

The previous prime is 440680087. The next prime is 440680139. The reversal of 440680138 is 831086044.

It is not an unprimeable number, because it can be changed into a prime (440680139) 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, 127758 + ... + 131161.

It is an arithmetic number, because the mean of its divisors is an integer number (44275320).

Almost surely, 2^440680138 is an apocalyptic number.

440680138 is a deficient number, since it is larger than the sum of its proper divisors (267724982).

440680138 is a wasteful number, since it uses less digits than its factorization.

440680138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258981.

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 440680138 is about 20992.3828566459. The cubic root of 440680138 is about 760.9821892580.

The spelling of 440680138 in words is "four hundred forty million, six hundred eighty thousand, one hundred thirty-eight".