53639982 has 80 divisors (see below), whose sum is σ = 135489024. Its totient is φ = 15714000.

The previous prime is 53639969. The next prime is 53639987. The reversal of 53639982 is 28993635.

53639982 is a `hidden beast` number, since 5 + 3 + 639 + 9 + 8 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53639987) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 54757 + ... + 55727.

Almost surely, 2^53639982 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53639982, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67744512).

53639982 is an abundant number, since it is smaller than the sum of its proper divisors (81849042).

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

53639982 is a wasteful number, since it uses less digits than its factorization.

53639982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1027 (or 1018 counting only the distinct ones).

The product of its digits is 349920, while the sum is 45.

The square root of 53639982 is about 7323.9321405922. The cubic root of 53639982 is about 377.1344519231.

The spelling of 53639982 in words is "fifty-three million, six hundred thirty-nine thousand, nine hundred eighty-two".