51448320 has 480 divisors, whose sum is σ = 229806720. Its totient is φ = 10321920.

The previous prime is 51448303. The next prime is 51448321. The reversal of 51448320 is 2384415.

It is a tau number, because it is divible by the number of its divisors (480).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51448321) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1774066 + ... + 1774094.

It is an arithmetic number, because the mean of its divisors is an integer number (478764).

Almost surely, 2^51448320 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 51448320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114903360).

51448320 is an abundant number, since it is smaller than the sum of its proper divisors (178358400).

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

51448320 is a wasteful number, since it uses less digits than its factorization.

51448320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76 (or 57 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 51448320 is about 7172.7484272070. The cubic root of 51448320 is about 371.9264509467.

The spelling of 51448320 in words is "fifty-one million, four hundred forty-eight thousand, three hundred twenty".