44155140 has 24 divisors (see below), whose sum is σ = 123634560. Its totient is φ = 11774688.

The previous prime is 44155123. The next prime is 44155141. The reversal of 44155140 is 4155144.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 44155140.

It is not an unprimeable number, because it can be changed into a prime (44155141) 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, 367900 + ... + 368019.

It is an arithmetic number, because the mean of its divisors is an integer number (5151440).

Almost surely, 2^44155140 is an apocalyptic number.

It is an amenable number.

44155140 is an abundant number, since it is smaller than the sum of its proper divisors (79479420).

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

44155140 is a wasteful number, since it uses less digits than its factorization.

44155140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 735931 (or 735929 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 44155140 is about 6644.9334082442. The cubic root of 44155140 is about 353.4492697351.

The spelling of 44155140 in words is "forty-four million, one hundred fifty-five thousand, one hundred forty".