51744020 has 48 divisors (see below), whose sum is σ = 114162048. Its totient is φ = 19662720.

The previous prime is 51743999. The next prime is 51744029. The reversal of 51744020 is 2044715.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51744029) 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 15 ways as a sum of consecutive naturals, for example, 90335 + ... + 90905.

It is an arithmetic number, because the mean of its divisors is an integer number (2378376).

Almost surely, 2^51744020 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 51744020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57081024).

51744020 is an abundant number, since it is smaller than the sum of its proper divisors (62418028).

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

51744020 is a wasteful number, since it uses less digits than its factorization.

51744020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 800 (or 798 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 51744020 is about 7193.3316342290. The cubic root of 51744020 is about 372.6376411303.

Adding to 51744020 its reverse (2044715), we get a palindrome (53788735).

The spelling of 51744020 in words is "fifty-one million, seven hundred forty-four thousand, twenty".