52747240 has 128 divisors (see below), whose sum is σ = 149909760. Its totient is φ = 16257024.

The previous prime is 52747231. The next prime is 52747271. The reversal of 52747240 is 4274725.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 156352 + ... + 156688.

It is an arithmetic number, because the mean of its divisors is an integer number (1171170).

Almost surely, 2^52747240 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 52747240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74954880).

52747240 is an abundant number, since it is smaller than the sum of its proper divisors (97162520).

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

52747240 is a wasteful number, since it uses less digits than its factorization.

52747240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411 (or 407 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 31.

The square root of 52747240 is about 7262.7295144457. The cubic root of 52747240 is about 375.0304923353.

The spelling of 52747240 in words is "fifty-two million, seven hundred forty-seven thousand, two hundred forty".