53278272 has 84 divisors (see below), whose sum is σ = 161725356. Its totient is φ = 16711680.

The previous prime is 53278271. The next prime is 53278319. The reversal of 53278272 is 27287235.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 40144896 + 13133376 = 6336^2 + 3624^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (53278271) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7072 + ... + 12512.

Almost surely, 2^53278272 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 53278272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80862678).

53278272 is an abundant number, since it is smaller than the sum of its proper divisors (108447084).

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

53278272 is a wasteful number, since it uses less digits than its factorization.

53278272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5476 (or 5463 counting only the distinct ones).

The product of its digits is 47040, while the sum is 36.

The square root of 53278272 is about 7299.1966681273. The cubic root of 53278272 is about 376.2848302028.

The spelling of 53278272 in words is "fifty-three million, two hundred seventy-eight thousand, two hundred seventy-two".