52729440 has 96 divisors (see below), whose sum is σ = 170644320. Its totient is φ = 13676544.

The previous prime is 52729429. The next prime is 52729447. The reversal of 52729440 is 4492725.

52729440 = 876² + 877² + ... + 939².

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52729447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16276 + ... + 19244.

It is an arithmetic number, because the mean of its divisors is an integer number (1777545).

Almost surely, 2^52729440 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 52729440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85322160).

52729440 is an abundant number, since it is smaller than the sum of its proper divisors (117914880).

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

52729440 is a wasteful number, since it uses less digits than its factorization.

52729440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3024 (or 3016 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 52729440 is about 7261.5039764501. The cubic root of 52729440 is about 374.9883018573.

The spelling of 52729440 in words is "fifty-two million, seven hundred twenty-nine thousand, four hundred forty".