53218928 has 20 divisors (see below), whose sum is σ = 117842160. Its totient is φ = 22808064.

The previous prime is 53218927. The next prime is 53218933. The reversal of 53218928 is 82981235.

It is a junction number, because it is equal to n+sod(n) for n = 53218891 and 53218900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53218927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 237473 + ... + 237696.

It is an arithmetic number, because the mean of its divisors is an integer number (5892108).

Almost surely, 2^53218928 is an apocalyptic number.

It is an amenable number.

53218928 is an abundant number, since it is smaller than the sum of its proper divisors (64623232).

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

53218928 is a wasteful number, since it uses less digits than its factorization.

53218928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475184 (or 475178 counting only the distinct ones).

The product of its digits is 34560, while the sum is 38.

The square root of 53218928 is about 7295.1304306366. The cubic root of 53218928 is about 376.1450700209.

The spelling of 53218928 in words is "fifty-three million, two hundred eighteen thousand, nine hundred twenty-eight".