52143740 has 72 divisors (see below), whose sum is σ = 124679520. Its totient is φ = 18282880.

The previous prime is 52143731. The next prime is 52143761. The reversal of 52143740 is 4734125.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 69809 + ... + 70551.

It is an arithmetic number, because the mean of its divisors is an integer number (1731660).

Almost surely, 2^52143740 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 52143740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62339760).

52143740 is an abundant number, since it is smaller than the sum of its proper divisors (72535780).

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

52143740 is a wasteful number, since it uses less digits than its factorization.

52143740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 803 (or 790 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 52143740 is about 7221.0622487277. The cubic root of 52143740 is about 373.5947166847.

Adding to 52143740 its reverse (4734125), we get a palindrome (56877865).

The spelling of 52143740 in words is "fifty-two million, one hundred forty-three thousand, seven hundred forty".