52140240 has 160 divisors (see below), whose sum is σ = 182131200. Its totient is φ = 13708800.

The previous prime is 52140211. The next prime is 52140293. The reversal of 52140240 is 4204125.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

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, 218041 + ... + 218279.

It is an arithmetic number, because the mean of its divisors is an integer number (1138320).

Almost surely, 2^52140240 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 52140240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91065600).

52140240 is an abundant number, since it is smaller than the sum of its proper divisors (129990960).

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

52140240 is a wasteful number, since it uses less digits than its factorization.

52140240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362 (or 350 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 52140240 is about 7220.8198980448. The cubic root of 52140240 is about 373.5863576706.

Adding to 52140240 its reverse (4204125), we get a palindrome (56344365).

The spelling of 52140240 in words is "fifty-two million, one hundred forty thousand, two hundred forty".