44640440 has 32 divisors (see below), whose sum is σ = 108168480. Its totient is φ = 16482432.

The previous prime is 44640413. The next prime is 44640457. The reversal of 44640440 is 4404644.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42404 + ... + 43443.

It is an arithmetic number, because the mean of its divisors is an integer number (3380265).

Almost surely, 2^44640440 is an apocalyptic number.

44640440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

44640440 is an abundant number, since it is smaller than the sum of its proper divisors (63528040).

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

44640440 is a wasteful number, since it uses less digits than its factorization.

44640440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85871 (or 85867 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 26.

The square root of 44640440 is about 6681.3501629536. The cubic root of 44640440 is about 354.7394504239.

The spelling of 44640440 in words is "forty-four million, six hundred forty thousand, four hundred forty".