53236638 has 72 divisors (see below), whose sum is σ = 144530568. Its totient is φ = 14037408.

The previous prime is 53236633. The next prime is 53236643. The reversal of 53236638 is 83663235.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (53236633) and next prime (53236643).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53236633) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 9145 + ... + 13787.

It is an arithmetic number, because the mean of its divisors is an integer number (2007369).

Almost surely, 2^53236638 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53236638, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72265284).

53236638 is an abundant number, since it is smaller than the sum of its proper divisors (91293930).

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

53236638 is a wasteful number, since it uses less digits than its factorization.

53236638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4678 (or 4668 counting only the distinct ones).

The product of its digits is 77760, while the sum is 36.

The square root of 53236638 is about 7296.3441530673. The cubic root of 53236638 is about 376.1867894532.

The spelling of 53236638 in words is "fifty-three million, two hundred thirty-six thousand, six hundred thirty-eight".