51980838 has 32 divisors (see below), whose sum is σ = 127954176. Its totient is φ = 13709088.

The previous prime is 51980821. The next prime is 51980839. The reversal of 51980838 is 83808915.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 51980838.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51980839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47056 + ... + 48147.

It is an arithmetic number, because the mean of its divisors is an integer number (3998568).

Almost surely, 2^51980838 is an apocalyptic number.

51980838 is an abundant number, since it is smaller than the sum of its proper divisors (75973338).

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

51980838 is a wasteful number, since it uses less digits than its factorization.

51980838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95228.

The product of its (nonzero) digits is 69120, while the sum is 42.

The square root of 51980838 is about 7209.7737828589. The cubic root of 51980838 is about 373.2052623702.

The spelling of 51980838 in words is "fifty-one million, nine hundred eighty thousand, eight hundred thirty-eight".