51976782 has 128 divisors (see below), whose sum is σ = 139345920. Its totient is φ = 14152320.

The previous prime is 51976781. The next prime is 51976789. The reversal of 51976782 is 28767915.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51976781) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 409203 + ... + 409329.

It is an arithmetic number, because the mean of its divisors is an integer number (1088640).

Almost surely, 2^51976782 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51976782, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69672960).

51976782 is an abundant number, since it is smaller than the sum of its proper divisors (87369138).

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

51976782 is a wasteful number, since it uses less digits than its factorization.

51976782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215 (or 209 counting only the distinct ones).

The product of its digits is 211680, while the sum is 45.

The square root of 51976782 is about 7209.4924925407. The cubic root of 51976782 is about 373.1955552039.

The spelling of 51976782 in words is "fifty-one million, nine hundred seventy-six thousand, seven hundred eighty-two".