52777780 has 72 divisors (see below), whose sum is σ = 123539976. Its totient is φ = 18923520.

The previous prime is 52777723. The next prime is 52777787. The reversal of 52777780 is 8777725.

It can be written as a sum of positive squares in 4 ways, for example, as 1024144 + 51753636 = 1012^2 + 7194^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52777787) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 273364 + ... + 273556.

It is an arithmetic number, because the mean of its divisors is an integer number (1715833).

Almost surely, 2^52777780 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 52777780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61769988).

52777780 is an abundant number, since it is smaller than the sum of its proper divisors (70762196).

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

52777780 is a wasteful number, since it uses less digits than its factorization.

52777780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337 (or 324 counting only the distinct ones).

The product of its (nonzero) digits is 192080, while the sum is 43.

The square root of 52777780 is about 7264.8317255116. The cubic root of 52777780 is about 375.1028577108.

The spelling of 52777780 in words is "fifty-two million, seven hundred seventy-seven thousand, seven hundred eighty".