53003840 has 56 divisors (see below), whose sum is σ = 128000760. Its totient is φ = 20901888.

The previous prime is 53003803. The next prime is 53003879. The reversal of 53003840 is 4830035.

It can be written as a sum of positive squares in 4 ways, for example, as 238144 + 52765696 = 488^2 + 7264^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22226 + ... + 24494.

Almost surely, 2^53003840 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 53003840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64000380).

53003840 is an abundant number, since it is smaller than the sum of its proper divisors (74996920).

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

53003840 is a wasteful number, since it uses less digits than its factorization.

53003840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2359 (or 2349 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 53003840 is about 7280.3736167864. The cubic root of 53003840 is about 375.6376469875.

Adding to 53003840 its reverse (4830035), we get a palindrome (57833875).

The spelling of 53003840 in words is "fifty-three million, three thousand, eight hundred forty".