53237440 has 112 divisors (see below), whose sum is σ = 133977888. Its totient is φ = 20127744.

The previous prime is 53237423. The next prime is 53237441. The reversal of 53237440 is 4473235.

It is a junction number, because it is equal to n+sod(n) for n = 53237399 and 53237408.

It is not an unprimeable number, because it can be changed into a prime (53237441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 729244 + ... + 729316.

Almost surely, 2^53237440 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 53237440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66988944).

53237440 is an abundant number, since it is smaller than the sum of its proper divisors (80740448).

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

53237440 is a wasteful number, since it uses less digits than its factorization.

53237440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186 (or 176 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 28.

The square root of 53237440 is about 7296.3991118907. The cubic root of 53237440 is about 376.1886785050.

The spelling of 53237440 in words is "fifty-three million, two hundred thirty-seven thousand, four hundred forty".