44131990 has 32 divisors (see below), whose sum is σ = 93006144. Its totient is φ = 14760960.

The previous prime is 44131981. The next prime is 44131999. The reversal of 44131990 is 9913144.

It is an interprime number because it is at equal distance from previous prime (44131981) and next prime (44131999).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44131999) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4819 + ... + 10558.

It is an arithmetic number, because the mean of its divisors is an integer number (2906442).

Almost surely, 2^44131990 is an apocalyptic number.

44131990 is an abundant number, since it is smaller than the sum of its proper divisors (48874154).

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

44131990 is a wasteful number, since it uses less digits than its factorization.

44131990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15432.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 44131990 is about 6643.1912511985. The cubic root of 44131990 is about 353.3874892268.

The spelling of 44131990 in words is "forty-four million, one hundred thirty-one thousand, nine hundred ninety".