52297440 has 288 divisors, whose sum is σ = 194957280. Its totient is φ = 11698176.

The previous prime is 52297439. The next prime is 52297451. The reversal of 52297440 is 4479225.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1803346 + ... + 1803374.

It is an arithmetic number, because the mean of its divisors is an integer number (676935).

Almost surely, 2^52297440 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 52297440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97478640).

52297440 is an abundant number, since it is smaller than the sum of its proper divisors (142659840).

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

52297440 is a wasteful number, since it uses less digits than its factorization.

52297440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94 (or 69 counting only the distinct ones).

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

The square root of 52297440 is about 7231.6968963031. The cubic root of 52297440 is about 373.9614285291.

The spelling of 52297440 in words is "fifty-two million, two hundred ninety-seven thousand, four hundred forty".