53871642 has 56 divisors (see below), whose sum is σ = 132209280. Its totient is φ = 16319880.

The previous prime is 53871641. The next prime is 53871659. The reversal of 53871642 is 24617835.

53871642 is a `hidden beast` number, since 5 + 3 + 8 + 7 + 1 + 642 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 53871597 and 53871606.

It is not an unprimeable number, because it can be changed into a prime (53871641) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 14359 + ... + 17717.

It is an arithmetic number, because the mean of its divisors is an integer number (2360880).

Almost surely, 2^53871642 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53871642, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66104640).

53871642 is an abundant number, since it is smaller than the sum of its proper divisors (78337638).

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

53871642 is a wasteful number, since it uses less digits than its factorization.

53871642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3390 (or 3375 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 53871642 is about 7339.7303765193. The cubic root of 53871642 is about 377.6765941305.

The spelling of 53871642 in words is "fifty-three million, eight hundred seventy-one thousand, six hundred forty-two".