51867760 has 80 divisors (see below), whose sum is σ = 143847936. Its totient is φ = 17005824.

The previous prime is 51867757. The next prime is 51867787. The reversal of 51867760 is 6776815.

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

It is a Harshad number since it is a multiple of its sum of digits (40).

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, 10867 + ... + 14893.

Almost surely, 2^51867760 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 51867760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71923968).

51867760 is an abundant number, since it is smaller than the sum of its proper divisors (91980176).

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

51867760 is a wasteful number, since it uses less digits than its factorization.

51867760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4070 (or 4064 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 40.

The square root of 51867760 is about 7201.9275197686. The cubic root of 51867760 is about 372.9344449909.

The spelling of 51867760 in words is "fifty-one million, eight hundred sixty-seven thousand, seven hundred sixty".