440142645 has 16 divisors (see below), whose sum is σ = 704488320. Its totient is φ = 234656064.

The previous prime is 440142629. The next prime is 440142671. The reversal of 440142645 is 546241044.

It is a happy number.

It is not a de Polignac number, because 440142645 - 2⁴ = 440142629 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76872 + ... + 82398.

It is an arithmetic number, because the mean of its divisors is an integer number (44030520).

Almost surely, 2^440142645 is an apocalyptic number.

It is an amenable number.

440142645 is a deficient number, since it is larger than the sum of its proper divisors (264345675).

440142645 is a wasteful number, since it uses less digits than its factorization.

440142645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10844.

The product of its (nonzero) digits is 15360, while the sum is 30.

The square root of 440142645 is about 20979.5768546460. The cubic root of 440142645 is about 760.6726760223.

Adding to 440142645 its reverse (546241044), we get a palindrome (986383689).

The spelling of 440142645 in words is "four hundred forty million, one hundred forty-two thousand, six hundred forty-five".