53857520 has 40 divisors (see below), whose sum is σ = 125951760. Its totient is φ = 21416960.

The previous prime is 53857499. The next prime is 53857537. The reversal of 53857520 is 2575835.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12440 + ... + 16200.

It is an arithmetic number, because the mean of its divisors is an integer number (3148794).

Almost surely, 2^53857520 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 53857520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62975880).

53857520 is an abundant number, since it is smaller than the sum of its proper divisors (72094240).

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

53857520 is a wasteful number, since it uses less digits than its factorization.

53857520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3953 (or 3947 counting only the distinct ones).

The product of its (nonzero) digits is 42000, while the sum is 35.

The square root of 53857520 is about 7338.7682890251. The cubic root of 53857520 is about 377.6435896605.

The spelling of 53857520 in words is "fifty-three million, eight hundred fifty-seven thousand, five hundred twenty".