44400840 has 64 divisors (see below), whose sum is σ = 145316160. Its totient is φ = 10763520.

The previous prime is 44400809. The next prime is 44400841. The reversal of 44400840 is 4800444.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 44400840.

It is not an unprimeable number, because it can be changed into a prime (44400841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15499 + ... + 18138.

It is an arithmetic number, because the mean of its divisors is an integer number (2270565).

Almost surely, 2^44400840 is an apocalyptic number.

44400840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

44400840 is an abundant number, since it is smaller than the sum of its proper divisors (100915320).

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

44400840 is a wasteful number, since it uses less digits than its factorization.

44400840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33662 (or 33658 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 24.

The square root of 44400840 is about 6663.3955308086. The cubic root of 44400840 is about 354.1036435648.

The spelling of 44400840 in words is "forty-four million, four hundred thousand, eight hundred forty".