52891440 has 160 divisors (see below), whose sum is σ = 197368320. Its totient is φ = 11446272.

The previous prime is 52891411. The next prime is 52891451. The reversal of 52891440 is 4419825.

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, 31092 + ... + 32748.

It is an arithmetic number, because the mean of its divisors is an integer number (1233552).

Almost surely, 2^52891440 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 52891440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98684160).

52891440 is an abundant number, since it is smaller than the sum of its proper divisors (144476880).

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

52891440 is a wasteful number, since it uses less digits than its factorization.

52891440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1699 (or 1693 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 52891440 is about 7272.6501359546. The cubic root of 52891440 is about 375.3719332088.

The spelling of 52891440 in words is "fifty-two million, eight hundred ninety-one thousand, four hundred forty".