44222640 has 160 divisors (see below), whose sum is σ = 170989056. Its totient is φ = 9185280.

The previous prime is 44222639. The next prime is 44222707. The reversal of 44222640 is 4622244.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 44222640.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17284 + ... + 19676.

Almost surely, 2^44222640 is an apocalyptic number.

44222640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 44222640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85494528).

44222640 is an abundant number, since it is smaller than the sum of its proper divisors (126766416).

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

44222640 is a wasteful number, since it uses less digits than its factorization.

44222640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2427 (or 2421 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 44222640 is about 6650.0105263075. The cubic root of 44222640 is about 353.6292841031.

Adding to 44222640 its reverse (4622244), we get a palindrome (48844884).

The spelling of 44222640 in words is "forty-four million, two hundred twenty-two thousand, six hundred forty".