51930396 has 90 divisors (see below), whose sum is σ = 157968888. Its totient is φ = 14832720.

The previous prime is 51930391. The next prime is 51930397. The reversal of 51930396 is 69303915.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 51930396.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51930391) 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 29 ways as a sum of consecutive naturals, for example, 14241 + ... + 17511.

Almost surely, 2^51930396 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 51930396, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78984444).

51930396 is an abundant number, since it is smaller than the sum of its proper divisors (106038492).

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

51930396 is a wasteful number, since it uses less digits than its factorization.

51930396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3301 (or 3283 counting only the distinct ones).

The product of its (nonzero) digits is 21870, while the sum is 36.

The square root of 51930396 is about 7206.2747657857. The cubic root of 51930396 is about 373.0845043296.

It can be divided in two parts, 51930 and 396, that added together give a triangular number (52326 = T₃₂₃).

The spelling of 51930396 in words is "fifty-one million, nine hundred thirty thousand, three hundred ninety-six".