52761440 has 96 divisors (see below), whose sum is σ = 131453280. Its totient is φ = 19984384.

The previous prime is 52761437. The next prime is 52761451. The reversal of 52761440 is 4416725.

It is a Harshad number since it is a multiple of its sum of digits (29).

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, 385052 + ... + 385188.

It is an arithmetic number, because the mean of its divisors is an integer number (1369305).

Almost surely, 2^52761440 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 52761440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65726640).

52761440 is an abundant number, since it is smaller than the sum of its proper divisors (78691840).

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

52761440 is a wasteful number, since it uses less digits than its factorization.

52761440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264 (or 256 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 52761440 is about 7263.7070425507. The cubic root of 52761440 is about 375.0641431019.

The spelling of 52761440 in words is "fifty-two million, seven hundred sixty-one thousand, four hundred forty".