44372640 has 144 divisors (see below), whose sum is σ = 151629408. Its totient is φ = 10902528.

The previous prime is 44372623. The next prime is 44372651. The reversal of 44372640 is 4627344.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 44372598 and 44372607.

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, 80847 + ... + 81393.

It is an arithmetic number, because the mean of its divisors is an integer number (1052982).

Almost surely, 2^44372640 is an apocalyptic number.

44372640 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 44372640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75814704).

44372640 is an abundant number, since it is smaller than the sum of its proper divisors (107256768).

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

44372640 is a wasteful number, since it uses less digits than its factorization.

44372640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 591 (or 570 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 30.

The square root of 44372640 is about 6661.2791564383. The cubic root of 44372640 is about 354.0286612180.

Adding to 44372640 its reverse (4627344), we get a palindrome (48999984).

The spelling of 44372640 in words is "forty-four million, three hundred seventy-two thousand, six hundred forty".