44721381 has 8 divisors (see below), whose sum is σ = 59938240. Its totient is φ = 29659392.

The previous prime is 44721379. The next prime is 44721389. The reversal of 44721381 is 18312744.

44721381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 44721381 - 2¹ = 44721379 is a prime.

It is a super-2 number, since 2×44721381² = 4000003837094322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44721389) 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 7 ways as a sum of consecutive naturals, for example, 38041 + ... + 39198.

It is an arithmetic number, because the mean of its divisors is an integer number (7492280).

Almost surely, 2^44721381 is an apocalyptic number.

It is an amenable number.

44721381 is a deficient number, since it is larger than the sum of its proper divisors (15216859).

44721381 is a wasteful number, since it uses less digits than its factorization.

44721381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77435.

The product of its digits is 5376, while the sum is 30.

The square root of 44721381 is about 6687.4046535259. The cubic root of 44721381 is about 354.9537227251.

The spelling of 44721381 in words is "forty-four million, seven hundred twenty-one thousand, three hundred eighty-one".