44440040 has 32 divisors (see below), whose sum is σ = 105873480. Its totient is φ = 16730112.

The previous prime is 44440037. The next prime is 44440043. The reversal of 44440040 is 4004444.

It is an interprime number because it is at equal distance from previous prime (44440037) and next prime (44440043).

It can be written as a sum of positive squares in 4 ways, for example, as 44063044 + 376996 = 6638^2 + 614^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 44439994 and 44440021.

It is not an unprimeable number, because it can be changed into a prime (44440043) 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, 31997 + ... + 33356.

Almost surely, 2^44440040 is an apocalyptic number.

44440040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

44440040 is an abundant number, since it is smaller than the sum of its proper divisors (61433440).

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

44440040 is a wasteful number, since it uses less digits than its factorization.

44440040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65381 (or 65377 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

The square root of 44440040 is about 6666.3363251489. The cubic root of 44440040 is about 354.2078216227.

Adding to 44440040 its reverse (4004444), we get a palindrome (48444484).

The spelling of 44440040 in words is "forty-four million, four hundred forty thousand, forty".