51787260 has 144 divisors (see below), whose sum is σ = 187439616. Its totient is φ = 11316096.

The previous prime is 51787259. The next prime is 51787271. The reversal of 51787260 is 6278715.

51787260 is a `hidden beast` number, since 517 + 87 + 2 + 60 = 666.

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

It is a congruent number.

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, 28087 + ... + 29873.

It is an arithmetic number, because the mean of its divisors is an integer number (1301664).

Almost surely, 2^51787260 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 51787260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93719808).

51787260 is an abundant number, since it is smaller than the sum of its proper divisors (135652356).

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

51787260 is a wasteful number, since it uses less digits than its factorization.

51787260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1832 (or 1827 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The square root of 51787260 is about 7196.3365680046. The cubic root of 51787260 is about 372.7414107088.

The spelling of 51787260 in words is "fifty-one million, seven hundred eighty-seven thousand, two hundred sixty".