53693240 has 128 divisors (see below), whose sum is σ = 136857600. Its totient is φ = 18869760.

The previous prime is 53693173. The next prime is 53693243. The reversal of 53693240 is 4239635.

53693240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×53693240³ (a number of 24 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 53693197 and 53693206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53693243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1013054 + ... + 1013106.

It is an arithmetic number, because the mean of its divisors is an integer number (1069200).

Almost surely, 2^53693240 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 53693240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68428800).

53693240 is an abundant number, since it is smaller than the sum of its proper divisors (83164360).

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

53693240 is a wasteful number, since it uses less digits than its factorization.

53693240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157 (or 153 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 32.

The square root of 53693240 is about 7327.5671269528. The cubic root of 53693240 is about 377.2592269018.

The spelling of 53693240 in words is "fifty-three million, six hundred ninety-three thousand, two hundred forty".