52878780 has 72 divisors (see below), whose sum is σ = 161152992. Its totient is φ = 14034816.

The previous prime is 52878779. The next prime is 52878799. The reversal of 52878780 is 8787825.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46782 + ... + 47898.

It is an arithmetic number, because the mean of its divisors is an integer number (2238236).

Almost surely, 2^52878780 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 52878780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80576496).

52878780 is an abundant number, since it is smaller than the sum of its proper divisors (108274212).

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

52878780 is a wasteful number, since it uses less digits than its factorization.

52878780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1395 (or 1390 counting only the distinct ones).

The product of its (nonzero) digits is 250880, while the sum is 45.

The square root of 52878780 is about 7271.7796996334. The cubic root of 52878780 is about 375.3419813685.

The spelling of 52878780 in words is "fifty-two million, eight hundred seventy-eight thousand, seven hundred eighty".