53218428 has 24 divisors (see below), whose sum is σ = 124298832. Its totient is φ = 17721984.

The previous prime is 53218427. The next prime is 53218439. The reversal of 53218428 is 82481235.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53218423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17776 + ... + 20552.

It is an arithmetic number, because the mean of its divisors is an integer number (5179118).

Almost surely, 2^53218428 is an apocalyptic number.

It is an amenable number.

53218428 is an abundant number, since it is smaller than the sum of its proper divisors (71080404).

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

53218428 is a wasteful number, since it uses less digits than its factorization.

53218428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4381 (or 4379 counting only the distinct ones).

The product of its digits is 15360, while the sum is 33.

The square root of 53218428 is about 7295.0961611208. The cubic root of 53218428 is about 376.1438920370.

The spelling of 53218428 in words is "fifty-three million, two hundred eighteen thousand, four hundred twenty-eight".