53640306 has 96 divisors (see below), whose sum is σ = 131127360. Its totient is φ = 16376256.

The previous prime is 53640283. The next prime is 53640313. The reversal of 53640306 is 60304635.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 53640306.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 341580 + ... + 341736.

It is an arithmetic number, because the mean of its divisors is an integer number (1365910).

Almost surely, 2^53640306 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53640306, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65563680).

53640306 is an abundant number, since it is smaller than the sum of its proper divisors (77487054).

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

53640306 is a wasteful number, since it uses less digits than its factorization.

53640306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230 (or 218 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 27.

The square root of 53640306 is about 7323.9542598244. The cubic root of 53640306 is about 377.1352112529.

The spelling of 53640306 in words is "fifty-three million, six hundred forty thousand, three hundred six".