53436420 has 72 divisors (see below), whose sum is σ = 162786624. Its totient is φ = 14188608.

The previous prime is 53436419. The next prime is 53436421. The reversal of 53436420 is 2463435.

It is an interprime number because it is at equal distance from previous prime (53436419) and next prime (53436421).

It is not an unprimeable number, because it can be changed into a prime (53436421) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 54777 + ... + 55743.

Almost surely, 2^53436420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53436420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81393312).

53436420 is an abundant number, since it is smaller than the sum of its proper divisors (109350204).

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

53436420 is a wasteful number, since it uses less digits than its factorization.

53436420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1289 (or 1284 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 27.

The square root of 53436420 is about 7310.0218877921. The cubic root of 53436420 is about 376.6567761345.

Adding to 53436420 its reverse (2463435), we get a palindrome (55899855).

The spelling of 53436420 in words is "fifty-three million, four hundred thirty-six thousand, four hundred twenty".