51560740 has 72 divisors (see below), whose sum is σ = 137434752. Its totient is φ = 16067520.

The previous prime is 51560723. The next prime is 51560791. The reversal of 51560740 is 4706515.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 51560699 and 51560708.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8389 + ... + 13171.

It is an arithmetic number, because the mean of its divisors is an integer number (1908816).

Almost surely, 2^51560740 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 51560740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68717376).

51560740 is an abundant number, since it is smaller than the sum of its proper divisors (85874012).

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

51560740 is a wasteful number, since it uses less digits than its factorization.

51560740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4817 (or 4808 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 51560740 is about 7180.5807564570. The cubic root of 51560740 is about 372.1971533656.

The spelling of 51560740 in words is "fifty-one million, five hundred sixty thousand, seven hundred forty".