440249840 has 20 divisors (see below), whose sum is σ = 1023581064. Its totient is φ = 176099904.

The previous prime is 440249839. The next prime is 440249863. The reversal of 440249840 is 48942044.

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 440249840.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2751482 + ... + 2751641.

Almost surely, 2^440249840 is an apocalyptic number.

440249840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

440249840 is an abundant number, since it is smaller than the sum of its proper divisors (583331224).

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

440249840 is a wasteful number, since it uses less digits than its factorization.

440249840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5503136 (or 5503130 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 35.

The square root of 440249840 is about 20982.1314455896. The cubic root of 440249840 is about 760.7344239501.

The spelling of 440249840 in words is "four hundred forty million, two hundred forty-nine thousand, eight hundred forty".