53787320 has 64 divisors (see below), whose sum is σ = 129820320. Its totient is φ = 19984384.

The previous prime is 53787313. The next prime is 53787323. The reversal of 53787320 is 2378735.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53787323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55964 + ... + 56916.

Almost surely, 2^53787320 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 53787320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64910160).

53787320 is an abundant number, since it is smaller than the sum of its proper divisors (76033000).

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

53787320 is a wasteful number, since it uses less digits than its factorization.

53787320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1064 (or 1060 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 35.

The square root of 53787320 is about 7333.9839105359. The cubic root of 53787320 is about 377.4794398404.

The spelling of 53787320 in words is "fifty-three million, seven hundred eighty-seven thousand, three hundred twenty".