44640400 has 120 divisors (see below), whose sum is σ = 124545600. Its totient is φ = 15060480.

The previous prime is 44640391. The next prime is 44640413. The reversal of 44640400 is 404644.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 299526 + ... + 299674.

It is an arithmetic number, because the mean of its divisors is an integer number (1037880).

Almost surely, 2^44640400 is an apocalyptic number.

44640400 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 44640400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62272800).

44640400 is an abundant number, since it is smaller than the sum of its proper divisors (79905200).

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

44640400 is a wasteful number, since it uses less digits than its factorization.

44640400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281 (or 270 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 44640400 is about 6681.3471695460. The cubic root of 44640400 is about 354.7393444693.

The spelling of 44640400 in words is "forty-four million, six hundred forty thousand, four hundred".