53439636 has 24 divisors (see below), whose sum is σ = 132027840. Its totient is φ = 16765312.

The previous prime is 53439623. The next prime is 53439643. The reversal of 53439636 is 63693435.

It is a junction number, because it is equal to n+sod(n) for n = 53439594 and 53439603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130776 + ... + 131183.

It is an arithmetic number, because the mean of its divisors is an integer number (5501160).

Almost surely, 2^53439636 is an apocalyptic number.

It is an amenable number.

53439636 is an abundant number, since it is smaller than the sum of its proper divisors (78588204).

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

53439636 is a wasteful number, since it uses less digits than its factorization.

53439636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261983 (or 261981 counting only the distinct ones).

The product of its digits is 174960, while the sum is 39.

The square root of 53439636 is about 7310.2418564641. The cubic root of 53439636 is about 376.6643321790.

The spelling of 53439636 in words is "fifty-three million, four hundred thirty-nine thousand, six hundred thirty-six".