53639936 has 72 divisors (see below), whose sum is σ = 125828640. Its totient is φ = 22339584.

The previous prime is 53639921. The next prime is 53639959. The reversal of 53639936 is 63993635.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65900 + ... + 66708.

It is an arithmetic number, because the mean of its divisors is an integer number (1747620).

Almost surely, 2^53639936 is an apocalyptic number.

53639936 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53639936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62914320).

53639936 is an abundant number, since it is smaller than the sum of its proper divisors (72188704).

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

53639936 is an equidigital number, since it uses as much as digits as its factorization.

53639936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 869 (or 855 counting only the distinct ones).

The product of its digits is 393660, while the sum is 44.

The square root of 53639936 is about 7323.9290002020. The cubic root of 53639936 is about 377.1343441167.

The spelling of 53639936 in words is "fifty-three million, six hundred thirty-nine thousand, nine hundred thirty-six".