51787464 has 48 divisors (see below), whose sum is σ = 136688400. Its totient is φ = 16305408.

The previous prime is 51787429. The next prime is 51787493. The reversal of 51787464 is 46478715.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 153504 + ... + 153840.

It is an arithmetic number, because the mean of its divisors is an integer number (2847675).

Almost surely, 2^51787464 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 51787464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68344200).

51787464 is an abundant number, since it is smaller than the sum of its proper divisors (84900936).

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

51787464 is a wasteful number, since it uses less digits than its factorization.

51787464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 702 (or 361 counting only the distinct ones).

The product of its digits is 188160, while the sum is 42.

The square root of 51787464 is about 7196.3507418691. The cubic root of 51787464 is about 372.7419001416.

The spelling of 51787464 in words is "fifty-one million, seven hundred eighty-seven thousand, four hundred sixty-four".