51842736 has 120 divisors (see below), whose sum is σ = 165275136. Its totient is φ = 15016320.

The previous prime is 51842731. The next prime is 51842761. The reversal of 51842736 is 63724815.

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 51842736.

It is not an unprimeable number, because it can be changed into a prime (51842731) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35721 + ... + 37143.

Almost surely, 2^51842736 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 51842736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82637568).

51842736 is an abundant number, since it is smaller than the sum of its proper divisors (113432400).

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

51842736 is a wasteful number, since it uses less digits than its factorization.

51842736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1471 (or 1462 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 51842736 is about 7200.1899974931. The cubic root of 51842736 is about 372.8744603121.

The spelling of 51842736 in words is "fifty-one million, eight hundred forty-two thousand, seven hundred thirty-six".