51796440 has 48 divisors (see below), whose sum is σ = 168339600. Its totient is φ = 13812288.

The previous prime is 51796421. The next prime is 51796447. The reversal of 51796440 is 4469715.

51796440 is a `hidden beast` number, since 5 + 1 + 7 + 9 + 644 + 0 = 666.

51796440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 51796395 and 51796404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51796447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71580 + ... + 72299.

It is an arithmetic number, because the mean of its divisors is an integer number (3507075).

Almost surely, 2^51796440 is an apocalyptic number.

It is an amenable number.

51796440 is an abundant number, since it is smaller than the sum of its proper divisors (116543160).

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

51796440 is a wasteful number, since it uses less digits than its factorization.

51796440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143896 (or 143889 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 51796440 is about 7196.9743642728. The cubic root of 51796440 is about 372.7634339116.

The spelling of 51796440 in words is "fifty-one million, seven hundred ninety-six thousand, four hundred forty".