44133640 has 16 divisors (see below), whose sum is σ = 99300780. Its totient is φ = 17653440.

The previous prime is 44133631. The next prime is 44133641. The reversal of 44133640 is 4633144.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 40424164 + 3709476 = 6358^2 + 1926^2 .

It is not an unprimeable number, because it can be changed into a prime (44133641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 551631 + ... + 551710.

Almost surely, 2^44133640 is an apocalyptic number.

44133640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

44133640 is an abundant number, since it is smaller than the sum of its proper divisors (55167140).

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

44133640 is a wasteful number, since it uses less digits than its factorization.

44133640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1103352 (or 1103348 counting only the distinct ones).

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

The square root of 44133640 is about 6643.3154373400. The cubic root of 44133640 is about 353.3918933041.

Adding to 44133640 its reverse (4633144), we get a palindrome (48766784).

The spelling of 44133640 in words is "forty-four million, one hundred thirty-three thousand, six hundred forty".