53725440 has 144 divisors (see below), whose sum is σ = 181899648. Its totient is φ = 13467648.

The previous prime is 53725439. The next prime is 53725489. The reversal of 53725440 is 4452735.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 53725398 and 53725407.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64869 + ... + 65691.

It is an arithmetic number, because the mean of its divisors is an integer number (1263192).

Almost surely, 2^53725440 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 53725440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90949824).

53725440 is an abundant number, since it is smaller than the sum of its proper divisors (128174208).

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

53725440 is a wasteful number, since it uses less digits than its factorization.

53725440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 864 (or 850 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 30.

The square root of 53725440 is about 7329.7639798291. The cubic root of 53725440 is about 377.3346263349.

The spelling of 53725440 in words is "fifty-three million, seven hundred twenty-five thousand, four hundred forty".