52578240 has 224 divisors, whose sum is σ = 196632576. Its totient is φ = 11735040.

The previous prime is 52578233. The next prime is 52578241. The reversal of 52578240 is 4287525.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52578241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 137089 + ... + 137471.

It is an arithmetic number, because the mean of its divisors is an integer number (877824).

Almost surely, 2^52578240 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 52578240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98316288).

52578240 is an abundant number, since it is smaller than the sum of its proper divisors (144054336).

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

52578240 is a wasteful number, since it uses less digits than its factorization.

52578240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427 (or 417 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 33.

The square root of 52578240 is about 7251.0854359882. The cubic root of 52578240 is about 374.6295363606.

The spelling of 52578240 in words is "fifty-two million, five hundred seventy-eight thousand, two hundred forty".