52357240 has 64 divisors (see below), whose sum is σ = 128187360. Its totient is φ = 19130880.

The previous prime is 52357231. The next prime is 52357241. The reversal of 52357240 is 4275325.

It is a junction number, because it is equal to n+sod(n) for n = 52357199 and 52357208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52357241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55170 + ... + 56110.

Almost surely, 2^52357240 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 52357240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64093680).

52357240 is an abundant number, since it is smaller than the sum of its proper divisors (75830120).

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

52357240 is a wasteful number, since it uses less digits than its factorization.

52357240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1072 (or 1068 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 28.

The square root of 52357240 is about 7235.8302909894. The cubic root of 52357240 is about 374.1039108070.

The spelling of 52357240 in words is "fifty-two million, three hundred fifty-seven thousand, two hundred forty".