52780000 has 240 divisors, whose sum is σ = 165322080. Its totient is φ = 16128000.

The previous prime is 52779989. The next prime is 52780001. The reversal of 52780000 is 8725.

52780000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52780001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1819986 + ... + 1820014.

It is an arithmetic number, because the mean of its divisors is an integer number (688842).

Almost surely, 2^52780000 is an apocalyptic number.

52780000 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 52780000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82661040).

52780000 is an abundant number, since it is smaller than the sum of its proper divisors (112542080).

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

52780000 is a wasteful number, since it uses less digits than its factorization.

52780000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79 (or 56 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 52780000 is about 7264.9845147805. The cubic root of 52780000 is about 375.1081169737.

Adding to 52780000 its reverse (8725), we get a palindrome (52788725).

The spelling of 52780000 in words is "fifty-two million, seven hundred eighty thousand".