51839028 has 60 divisors (see below), whose sum is σ = 136383940. Its totient is φ = 17169408.

The previous prime is 51839027. The next prime is 51839041. The reversal of 51839028 is 82093815.

It can be written as a sum of positive squares in 2 ways, for example, as 20903184 + 30935844 = 4572^2 + 5562^2 .

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 = 51838983 and 51839001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51839023) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 62118 + ... + 62946.

Almost surely, 2^51839028 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 51839028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68191970).

51839028 is an abundant number, since it is smaller than the sum of its proper divisors (84544912).

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

51839028 is a wasteful number, since it uses less digits than its factorization.

51839028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1038 (or 1027 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 51839028 is about 7199.9324996836. The cubic root of 51839028 is about 372.8655702755.

The spelling of 51839028 in words is "fifty-one million, eight hundred thirty-nine thousand, twenty-eight".