51394784 has 36 divisors (see below), whose sum is σ = 115880184. Its totient is φ = 21980352.

The previous prime is 51394729. The next prime is 51394801. The reversal of 51394784 is 48749315.

It is a super-3 number, since 3×51394784³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 107057 + ... + 107535.

It is an arithmetic number, because the mean of its divisors is an integer number (3218894).

Almost surely, 2^51394784 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 51394784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57940092).

51394784 is an abundant number, since it is smaller than the sum of its proper divisors (64485400).

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

51394784 is an frugal number, since it uses more digits than its factorization.

51394784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 975 (or 488 counting only the distinct ones).

The product of its digits is 120960, while the sum is 41.

The square root of 51394784 is about 7169.0155530589. The cubic root of 51394784 is about 371.7973999887.

The spelling of 51394784 in words is "fifty-one million, three hundred ninety-four thousand, seven hundred eighty-four".