52404540 has 96 divisors (see below), whose sum is σ = 157489920. Its totient is φ = 12973056.

The previous prime is 52404497. The next prime is 52404563. The reversal of 52404540 is 4540425.

52404540 = T₁₆ + T₁₇ + ... + T₆₇₉.

It is a super-2 number, since 2×52404540² = 5492471625223200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 52404540.

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, 84351 + ... + 84969.

It is an arithmetic number, because the mean of its divisors is an integer number (1640520).

Almost surely, 2^52404540 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 52404540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78744960).

52404540 is an abundant number, since it is smaller than the sum of its proper divisors (105085380).

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

52404540 is a wasteful number, since it uses less digits than its factorization.

52404540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 731 (or 729 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 24.

The square root of 52404540 is about 7239.0980101115. The cubic root of 52404540 is about 374.2165331748.

Adding to 52404540 its reverse (4540425), we get a palindrome (56944965).

The spelling of 52404540 in words is "fifty-two million, four hundred four thousand, five hundred forty".