44007640 has 32 divisors (see below), whose sum is σ = 99208080. Its totient is φ = 17569152.

The previous prime is 44007599. The next prime is 44007641. The reversal of 44007640 is 4670044.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44007641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35674 + ... + 36886.

Almost surely, 2^44007640 is an apocalyptic number.

44007640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

44007640 is an abundant number, since it is smaller than the sum of its proper divisors (55200440).

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

44007640 is a wasteful number, since it uses less digits than its factorization.

44007640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2131 (or 2127 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 44007640 is about 6633.8254423824. The cubic root of 44007640 is about 353.0552655783.

Adding to 44007640 its reverse (4670044), we get a palindrome (48677684).

The spelling of 44007640 in words is "forty-four million, seven thousand, six hundred forty".