52780028 has 24 divisors (see below), whose sum is σ = 106653792. Its totient is φ = 22385664.

The previous prime is 52780001. The next prime is 52780037. The reversal of 52780028 is 82008725.

It is a junction number, because it is equal to n+sod(n) for n = 52779976 and 52780003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7001 + ... + 12432.

It is an arithmetic number, because the mean of its divisors is an integer number (4443908).

Almost surely, 2^52780028 is an apocalyptic number.

It is an amenable number.

52780028 is an abundant number, since it is smaller than the sum of its proper divisors (53873764).

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

52780028 is a wasteful number, since it uses less digits than its factorization.

52780028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19541 (or 19539 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 32.

The square root of 52780028 is about 7264.9864418318. The cubic root of 52780028 is about 375.1081833058.

The spelling of 52780028 in words is "fifty-two million, seven hundred eighty thousand, twenty-eight".