51707838 has 96 divisors (see below), whose sum is σ = 131918976. Its totient is φ = 13390272.

The previous prime is 51707819. The next prime is 51707869. The reversal of 51707838 is 83870715.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 51707796 and 51707805.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 317145 + ... + 317307.

It is an arithmetic number, because the mean of its divisors is an integer number (1374156).

Almost surely, 2^51707838 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51707838, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65959488).

51707838 is an abundant number, since it is smaller than the sum of its proper divisors (80211138).

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

51707838 is a wasteful number, since it uses less digits than its factorization.

51707838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278 (or 271 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 39.

The square root of 51707838 is about 7190.8162262708. The cubic root of 51707838 is about 372.5507652687.

The spelling of 51707838 in words is "fifty-one million, seven hundred seven thousand, eight hundred thirty-eight".