51739944 has 64 divisors (see below), whose sum is σ = 135648000. Its totient is φ = 16423680.

The previous prime is 51739939. The next prime is 51739951. The reversal of 51739944 is 44993715.

51739944 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 51739896 and 51739905.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 54514 + ... + 55454.

It is an arithmetic number, because the mean of its divisors is an integer number (2119500).

Almost surely, 2^51739944 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51739944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67824000).

51739944 is an abundant number, since it is smaller than the sum of its proper divisors (83908056).

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

51739944 is a wasteful number, since it uses less digits than its factorization.

51739944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1058 (or 1054 counting only the distinct ones).

The product of its digits is 136080, while the sum is 42.

The square root of 51739944 is about 7193.0483106955. The cubic root of 51739944 is about 372.6278563545.

The spelling of 51739944 in words is "fifty-one million, seven hundred thirty-nine thousand, nine hundred forty-four".