44639890 has 16 divisors (see below), whose sum is σ = 81321408. Its totient is φ = 17640496.

The previous prime is 44639887. The next prime is 44639899. The reversal of 44639890 is 9893644.

It is not an unprimeable number, because it can be changed into a prime (44639899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26062 + ... + 27721.

It is an arithmetic number, because the mean of its divisors is an integer number (5082588).

Almost surely, 2^44639890 is an apocalyptic number.

44639890 is a deficient number, since it is larger than the sum of its proper divisors (36681518).

44639890 is a wasteful number, since it uses less digits than its factorization.

44639890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53873.

The product of its (nonzero) digits is 186624, while the sum is 43.

The square root of 44639890 is about 6681.3090034813. The cubic root of 44639890 is about 354.7379935423.

The spelling of 44639890 in words is "forty-four million, six hundred thirty-nine thousand, eight hundred ninety".