53228736 has 168 divisors, whose sum is σ = 172443648. Its totient is φ = 15552000.

The previous prime is 53228729. The next prime is 53228789. The reversal of 53228736 is 63782235.

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

It is a self number, because there is not a number n which added to its sum of digits gives 53228736.

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, 196281 + ... + 196551.

Almost surely, 2^53228736 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 53228736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86221824).

53228736 is an abundant number, since it is smaller than the sum of its proper divisors (119214912).

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

53228736 is a wasteful number, since it uses less digits than its factorization.

53228736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331 (or 318 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

The square root of 53228736 is about 7295.8026289093. The cubic root of 53228736 is about 376.1681758617.

The spelling of 53228736 in words is "fifty-three million, two hundred twenty-eight thousand, seven hundred thirty-six".