44006440 has 16 divisors (see below), whose sum is σ = 99014580. Its totient is φ = 17602560.

The previous prime is 44006423. The next prime is 44006467. The reversal of 44006440 is 4460044.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 39262756 + 4743684 = 6266^2 + 2178^2 .

It is a super-2 number, since 2×44006440² = 3873133522947200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 550041 + ... + 550120.

Almost surely, 2^44006440 is an apocalyptic number.

44006440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

44006440 is an abundant number, since it is smaller than the sum of its proper divisors (55008140).

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

44006440 is a wasteful number, since it uses less digits than its factorization.

44006440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1100172 (or 1100168 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 44006440 is about 6633.7349962144. The cubic root of 44006440 is about 353.0520565130.

Adding to 44006440 its reverse (4460044), we get a palindrome (48466484).

The spelling of 44006440 in words is "forty-four million, six thousand, four hundred forty".