51368448 has 80 divisors (see below), whose sum is σ = 139651776. Its totient is φ = 16773120.

The previous prime is 51368417. The next prime is 51368479. The reversal of 51368448 is 84486315.

It is an interprime number because it is at equal distance from previous prime (51368417) and next prime (51368479).

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81093 + ... + 81723.

Almost surely, 2^51368448 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 51368448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69825888).

51368448 is an abundant number, since it is smaller than the sum of its proper divisors (88283328).

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

51368448 is an equidigital number, since it uses as much as digits as its factorization.

51368448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 705 (or 689 counting only the distinct ones).

The product of its digits is 92160, while the sum is 39.

The square root of 51368448 is about 7167.1785243567. The cubic root of 51368448 is about 371.7338829770.

The spelling of 51368448 in words is "fifty-one million, three hundred sixty-eight thousand, four hundred forty-eight".