53500986 has 80 divisors (see below), whose sum is σ = 149497920. Its totient is φ = 13893120.

The previous prime is 53500957. The next prime is 53500991. The reversal of 53500986 is 68900535.

It is a self number, because there is not a number n which added to its sum of digits gives 53500986.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 10330 + ... + 14618.

It is an arithmetic number, because the mean of its divisors is an integer number (1868724).

Almost surely, 2^53500986 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53500986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74748960).

53500986 is an abundant number, since it is smaller than the sum of its proper divisors (95996934).

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

53500986 is a wasteful number, since it uses less digits than its factorization.

53500986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4321 (or 4312 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 53500986 is about 7314.4368204258. The cubic root of 53500986 is about 376.8084169891.

It can be divided in two parts, 535009 and 86, that added together give a triangular number (535095 = T₁₀₃₄).

The spelling of 53500986 in words is "fifty-three million, five hundred thousand, nine hundred eighty-six".