52440000 has 280 divisors, whose sum is σ = 190439040. Its totient is φ = 12672000.

The previous prime is 52439993. The next prime is 52440001. The reversal of 52440000 is 4425.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52440001) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2279989 + ... + 2280011.

Almost surely, 2^52440000 is an apocalyptic number.

52440000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 52440000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95219520).

52440000 is an abundant number, since it is smaller than the sum of its proper divisors (137999040).

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

52440000 is a wasteful number, since it uses less digits than its factorization.

52440000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77 (or 52 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 15.

The square root of 52440000 is about 7241.5467960927. The cubic root of 52440000 is about 374.3009197970.

Adding to 52440000 its reverse (4425), we get a palindrome (52444425).

The spelling of 52440000 in words is "fifty-two million, four hundred forty thousand".