51383760 has 80 divisors (see below), whose sum is σ = 160007616. Its totient is φ = 13640704.

The previous prime is 51383747. The next prime is 51383779. The reversal of 51383760 is 6738315.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82972 + ... + 83588.

Almost surely, 2^51383760 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 51383760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80003808).

51383760 is an abundant number, since it is smaller than the sum of its proper divisors (108623856).

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

51383760 is a wasteful number, since it uses less digits than its factorization.

51383760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 980 (or 974 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 51383760 is about 7168.2466475422. The cubic root of 51383760 is about 371.7708150106.

The spelling of 51383760 in words is "fifty-one million, three hundred eighty-three thousand, seven hundred sixty".