52817780 has 12 divisors (see below), whose sum is σ = 110917380. Its totient is φ = 21127104.

The previous prime is 52817749. The next prime is 52817789. The reversal of 52817780 is 8771825.

It can be written as a sum of positive squares in 2 ways, for example, as 35545444 + 17272336 = 5962^2 + 4156^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52817789) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1320425 + ... + 1320464.

It is an arithmetic number, because the mean of its divisors is an integer number (9243115).

Almost surely, 2^52817780 is an apocalyptic number.

It is an amenable number.

52817780 is an abundant number, since it is smaller than the sum of its proper divisors (58099600).

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

52817780 is a wasteful number, since it uses less digits than its factorization.

52817780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2640898 (or 2640896 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 38.

The square root of 52817780 is about 7267.5841928388. The cubic root of 52817780 is about 375.1975966040.

The spelling of 52817780 in words is "fifty-two million, eight hundred seventeen thousand, seven hundred eighty".