51860880 has 240 divisors, whose sum is σ = 194987520. Its totient is φ = 12275712.

The previous prime is 51860869. The next prime is 51860909. The reversal of 51860880 is 8806815.

51860880 is a `hidden beast` number, since 518 + 60 + 8 + 80 = 666.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 232449 + ... + 232671.

It is an arithmetic number, because the mean of its divisors is an integer number (812448).

Almost surely, 2^51860880 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 51860880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97493760).

51860880 is an abundant number, since it is smaller than the sum of its proper divisors (143126640).

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

51860880 is a wasteful number, since it uses less digits than its factorization.

51860880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278 (or 269 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 36.

The square root of 51860880 is about 7201.4498540225. The cubic root of 51860880 is about 372.9179549630.

The spelling of 51860880 in words is "fifty-one million, eight hundred sixty thousand, eight hundred eighty".