51776730 has 96 divisors (see below), whose sum is σ = 146038464. Its totient is φ = 12676608.

The previous prime is 51776723. The next prime is 51776737. The reversal of 51776730 is 3767715.

51776730 is a `hidden beast` number, since 517 + 76 + 73 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (51776723) and next prime (51776737).

It is not an unprimeable number, because it can be changed into a prime (51776737) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 65397 + ... + 66183.

It is an arithmetic number, because the mean of its divisors is an integer number (1521234).

Almost surely, 2^51776730 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51776730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73019232).

51776730 is an abundant number, since it is smaller than the sum of its proper divisors (94261734).

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

51776730 is a wasteful number, since it uses less digits than its factorization.

51776730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 860 (or 857 counting only the distinct ones).

The product of its (nonzero) digits is 30870, while the sum is 36.

The square root of 51776730 is about 7195.6049085536. The cubic root of 51776730 is about 372.7161455947.

The spelling of 51776730 in words is "fifty-one million, seven hundred seventy-six thousand, seven hundred thirty".