51407878 has 8 divisors (see below), whose sum is σ = 77142240. Its totient is φ = 25693800.

The previous prime is 51407861. The next prime is 51407879. The reversal of 51407878 is 87870415.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 51407878.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51407879) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7528 + ... + 12628.

It is an arithmetic number, because the mean of its divisors is an integer number (9642780).

Almost surely, 2^51407878 is an apocalyptic number.

51407878 is a deficient number, since it is larger than the sum of its proper divisors (25734362).

51407878 is a wasteful number, since it uses less digits than its factorization.

51407878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10142.

The product of its (nonzero) digits is 62720, while the sum is 40.

The square root of 51407878 is about 7169.9287304687. The cubic root of 51407878 is about 371.8289719460.

The spelling of 51407878 in words is "fifty-one million, four hundred seven thousand, eight hundred seventy-eight".