44331640 has 32 divisors (see below), whose sum is σ = 101016000. Its totient is φ = 17506944.

The previous prime is 44331629. The next prime is 44331647. The reversal of 44331640 is 4613344.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44331647) 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, 3855 + ... + 10174.

It is an arithmetic number, because the mean of its divisors is an integer number (3156750).

Almost surely, 2^44331640 is an apocalyptic number.

44331640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

44331640 is an abundant number, since it is smaller than the sum of its proper divisors (56684360).

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

44331640 is a wasteful number, since it uses less digits than its factorization.

44331640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14119 (or 14115 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 44331640 is about 6658.2009582169. The cubic root of 44331640 is about 353.9195876384.

Adding to 44331640 its reverse (4613344), we get a palindrome (48944984).

The spelling of 44331640 in words is "forty-four million, three hundred thirty-one thousand, six hundred forty".