440742640 has 40 divisors (see below), whose sum is σ = 1103554368. Its totient is φ = 162735360.

The previous prime is 440742637. The next prime is 440742671. The reversal of 440742640 is 46247044.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 210856 + ... + 212935.

Almost surely, 2^440742640 is an apocalyptic number.

440742640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

440742640 is an abundant number, since it is smaller than the sum of its proper divisors (662811728).

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

440742640 is a wasteful number, since it uses less digits than its factorization.

440742640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423817 (or 423811 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 31.

The square root of 440742640 is about 20993.8714866982. The cubic root of 440742640 is about 761.0181644519.

Adding to 440742640 its reverse (46247044), we get a palindrome (486989684).

The spelling of 440742640 in words is "four hundred forty million, seven hundred forty-two thousand, six hundred forty".