52661040 has 80 divisors (see below), whose sum is σ = 166060800. Its totient is φ = 13801216.

The previous prime is 52661023. The next prime is 52661137. The reversal of 52661040 is 4016625.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 52661040.

It is an unprimeable number.

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, 12301 + ... + 16019.

It is an arithmetic number, because the mean of its divisors is an integer number (2075760).

Almost surely, 2^52661040 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 52661040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83030400).

52661040 is an abundant number, since it is smaller than the sum of its proper divisors (113399760).

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

52661040 is a wasteful number, since it uses less digits than its factorization.

52661040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3794 (or 3788 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 52661040 is about 7256.7926799654. The cubic root of 52661040 is about 374.8260882472.

Adding to 52661040 its reverse (4016625), we get a palindrome (56677665).

The spelling of 52661040 in words is "fifty-two million, six hundred sixty-one thousand, forty".