44324640 has 72 divisors (see below), whose sum is σ = 151262748. Its totient is φ = 11819520.

The previous prime is 44324633. The next prime is 44324647. The reversal of 44324640 is 4642344.

It is an interprime number because it is at equal distance from previous prime (44324633) and next prime (44324647).

It can be written as a sum of positive squares in 2 ways, for example, as 42146064 + 2178576 = 6492^2 + 1476^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×44324640² = 3929347422259200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (44324647) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13951 + ... + 16830.

Almost surely, 2^44324640 is an apocalyptic number.

44324640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

44324640 is an abundant number, since it is smaller than the sum of its proper divisors (106938108).

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

44324640 is a wasteful number, since it uses less digits than its factorization.

44324640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30802 (or 30791 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

The square root of 44324640 is about 6657.6752699422. The cubic root of 44324640 is about 353.9009585996.

Adding to 44324640 its reverse (4642344), we get a palindrome (48966984).

The spelling of 44324640 in words is "forty-four million, three hundred twenty-four thousand, six hundred forty".