52403540 has 48 divisors (see below), whose sum is σ = 128352000. Its totient is φ = 17964576.

The previous prime is 52403513. The next prime is 52403557. The reversal of 52403540 is 4530425.

It is a super-2 number, since 2×52403540² = 5492262009063200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3041 + ... + 10679.

It is an arithmetic number, because the mean of its divisors is an integer number (2674000).

Almost surely, 2^52403540 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 52403540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64176000).

52403540 is an abundant number, since it is smaller than the sum of its proper divisors (75948460).

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

52403540 is a wasteful number, since it uses less digits than its factorization.

52403540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7669 (or 7653 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 52403540 is about 7239.0289404035. The cubic root of 52403540 is about 374.2141528536.

Adding to 52403540 its reverse (4530425), we get a palindrome (56933965).

The spelling of 52403540 in words is "fifty-two million, four hundred three thousand, five hundred forty".