52288440 has 128 divisors (see below), whose sum is σ = 163676160. Its totient is φ = 13353984.

The previous prime is 52288429. The next prime is 52288451. The reversal of 52288440 is 4488225.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (52288429) and next prime (52288451).

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, 411657 + ... + 411783.

It is an arithmetic number, because the mean of its divisors is an integer number (1278720).

Almost surely, 2^52288440 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 52288440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81838080).

52288440 is an abundant number, since it is smaller than the sum of its proper divisors (111387720).

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

52288440 is a wasteful number, since it uses less digits than its factorization.

52288440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261 (or 257 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 33.

The square root of 52288440 is about 7231.0746089361. The cubic root of 52288440 is about 373.9399753060.

The spelling of 52288440 in words is "fifty-two million, two hundred eighty-eight thousand, four hundred forty".