44640090 has 96 divisors (see below), whose sum is σ = 128696256. Its totient is φ = 10644480.

The previous prime is 44640073. The next prime is 44640091. The reversal of 44640090 is 9004644.

44640090 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44640091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 65994 + ... + 66666.

It is an arithmetic number, because the mean of its divisors is an integer number (1340586).

Almost surely, 2^44640090 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 44640090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64348128).

44640090 is an abundant number, since it is smaller than the sum of its proper divisors (84056166).

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

44640090 is a wasteful number, since it uses less digits than its factorization.

44640090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 764 (or 761 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 44640090 is about 6681.3239705915. The cubic root of 44640090 is about 354.7385233188.

The spelling of 44640090 in words is "forty-four million, six hundred forty thousand, ninety".