53715840 has 128 divisors (see below), whose sum is σ = 173538720. Its totient is φ = 14131200.

The previous prime is 53715829. The next prime is 53715887. The reversal of 53715840 is 4851735.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 193782 + ... + 194058.

Almost surely, 2^53715840 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 53715840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86769360).

53715840 is an abundant number, since it is smaller than the sum of its proper divisors (119822880).

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

53715840 is a wasteful number, since it uses less digits than its factorization.

53715840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400 (or 388 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 33.

The square root of 53715840 is about 7329.1090863761. The cubic root of 53715840 is about 377.3121501536.

It can be divided in two parts, 5371 and 5840, that added together give a palindrome (11211).

The spelling of 53715840 in words is "fifty-three million, seven hundred fifteen thousand, eight hundred forty".