51660448 has 48 divisors (see below), whose sum is σ = 117016704. Its totient is φ = 21991680.

The previous prime is 51660443. The next prime is 51660463. The reversal of 51660448 is 84406615.

It is not an unprimeable number, because it can be changed into a prime (51660443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36718 + ... + 38098.

It is an arithmetic number, because the mean of its divisors is an integer number (2437848).

Almost surely, 2^51660448 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 51660448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58508352).

51660448 is an abundant number, since it is smaller than the sum of its proper divisors (65356256).

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

51660448 is a wasteful number, since it uses less digits than its factorization.

51660448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1565 (or 1557 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 51660448 is about 7187.5202956235. The cubic root of 51660448 is about 372.4369167831.

The spelling of 51660448 in words is "fifty-one million, six hundred sixty thousand, four hundred forty-eight".