44686640 has 20 divisors (see below), whose sum is σ = 103896624. Its totient is φ = 17874624.

The previous prime is 44686583. The next prime is 44686661. The reversal of 44686640 is 4668644.

44686640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a junction number, because it is equal to n+sod(n) for n = 44686594 and 44686603.

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 3 ways as a sum of consecutive naturals, for example, 279212 + ... + 279371.

Almost surely, 2^44686640 is an apocalyptic number.

44686640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

44686640 is an abundant number, since it is smaller than the sum of its proper divisors (59209984).

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

44686640 is a wasteful number, since it uses less digits than its factorization.

44686640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558596 (or 558590 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 38.

The square root of 44686640 is about 6684.8066538981. The cubic root of 44686640 is about 354.8617857773.

The spelling of 44686640 in words is "forty-four million, six hundred eighty-six thousand, six hundred forty".