440143728 has 20 divisors (see below), whose sum is σ = 1137038088. Its totient is φ = 146714560.

The previous prime is 440143727. The next prime is 440143729. The reversal of 440143728 is 827341044.

It is an interprime number because it is at equal distance from previous prime (440143727) and next prime (440143729).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440143727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4584783 + ... + 4584878.

Almost surely, 2^440143728 is an apocalyptic number.

440143728 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

440143728 is an abundant number, since it is smaller than the sum of its proper divisors (696894360).

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

440143728 is a wasteful number, since it uses less digits than its factorization.

440143728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9169672 (or 9169666 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 33.

The square root of 440143728 is about 20979.6026654463. The cubic root of 440143728 is about 760.6732999169.

The spelling of 440143728 in words is "four hundred forty million, one hundred forty-three thousand, seven hundred twenty-eight".