53986686 has 64 divisors (see below), whose sum is σ = 121927680. Its totient is φ = 15822720.

The previous prime is 53986649. The next prime is 53986693. The reversal of 53986686 is 68668935.

It is a super-3 number, since 3×53986686³ (a number of 24 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 200560 + ... + 200828.

It is an arithmetic number, because the mean of its divisors is an integer number (1905120).

Almost surely, 2^53986686 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53986686, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60963840).

53986686 is an abundant number, since it is smaller than the sum of its proper divisors (67940994).

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

53986686 is a wasteful number, since it uses less digits than its factorization.

53986686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401.

The product of its digits is 1866240, while the sum is 51.

The square root of 53986686 is about 7347.5632695473. The cubic root of 53986686 is about 377.9452483617.

The spelling of 53986686 in words is "fifty-three million, nine hundred eighty-six thousand, six hundred eighty-six".