51730800 has 120 divisors (see below), whose sum is σ = 180821760. Its totient is φ = 12537600.

The previous prime is 51730781. The next prime is 51730801. The reversal of 51730800 is 803715.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51730801) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11241 + ... + 15159.

It is an arithmetic number, because the mean of its divisors is an integer number (1506848).

Almost surely, 2^51730800 is an apocalyptic number.

51730800 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51730800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90410880).

51730800 is an abundant number, since it is smaller than the sum of its proper divisors (129090960).

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

51730800 is a wasteful number, since it uses less digits than its factorization.

51730800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3951 (or 3940 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 51730800 is about 7192.4126689172. The cubic root of 51730800 is about 372.6059035549.

The spelling of 51730800 in words is "fifty-one million, seven hundred thirty thousand, eight hundred".