53717640 has 64 divisors (see below), whose sum is σ = 161913600. Its totient is φ = 14257152.

The previous prime is 53717633. The next prime is 53717669. The reversal of 53717640 is 4671735.

It is a zygodrome in base 16.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27744 + ... + 29616.

It is an arithmetic number, because the mean of its divisors is an integer number (2529900).

Almost surely, 2^53717640 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 53717640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80956800).

53717640 is an abundant number, since it is smaller than the sum of its proper divisors (108195960).

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

53717640 is a wasteful number, since it uses less digits than its factorization.

53717640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2126 (or 2122 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 33.

The square root of 53717640 is about 7329.2318833559. The cubic root of 53717640 is about 377.3163646415.

The spelling of 53717640 in words is "fifty-three million, seven hundred seventeen thousand, six hundred forty".