440280828 has 54 divisors (see below), whose sum is σ = 1205144304. Its totient is φ = 135469152.

The previous prime is 440280823. The next prime is 440280839. The reversal of 440280828 is 828082044.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 440280792 and 440280801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440280821) by changing a digit.

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 17 ways as a sum of consecutive naturals, for example, 30100 + ... + 42267.

Almost surely, 2^440280828 is an apocalyptic number.

It is an amenable number.

440280828 is an abundant number, since it is smaller than the sum of its proper divisors (764863476).

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

440280828 is a wasteful number, since it uses less digits than its factorization.

440280828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72403 (or 72385 counting only the distinct ones).

The product of its (nonzero) digits is 32768, while the sum is 36.

The square root of 440280828 is about 20982.8698704443. The cubic root of 440280828 is about 760.7522722135.

The spelling of 440280828 in words is "four hundred forty million, two hundred eighty thousand, eight hundred twenty-eight".