51396768 has 120 divisors (see below), whose sum is σ = 153679680. Its totient is φ = 16848000.

The previous prime is 51396757. The next prime is 51396769. The reversal of 51396768 is 86769315.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (51396769) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 204643 + ... + 204893.

It is an arithmetic number, because the mean of its divisors is an integer number (1280664).

Almost surely, 2^51396768 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 51396768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76839840).

51396768 is an abundant number, since it is smaller than the sum of its proper divisors (102282912).

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

51396768 is a wasteful number, since it uses less digits than its factorization.

51396768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352 (or 335 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 51396768 is about 7169.1539249761. The cubic root of 51396768 is about 371.8021841094.

The spelling of 51396768 in words is "fifty-one million, three hundred ninety-six thousand, seven hundred sixty-eight".