53287920 has 240 divisors, whose sum is σ = 208528320. Its totient is φ = 11943936.

The previous prime is 53287919. The next prime is 53287957. The reversal of 53287920 is 2978235.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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, 488826 + ... + 488934.

It is an arithmetic number, because the mean of its divisors is an integer number (868868).

Almost surely, 2^53287920 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 53287920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104264160).

53287920 is an abundant number, since it is smaller than the sum of its proper divisors (155240400).

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

53287920 is a wasteful number, since it uses less digits than its factorization.

53287920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232 (or 223 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 53287920 is about 7299.8575328564. The cubic root of 53287920 is about 376.3075422565.

The spelling of 53287920 in words is "fifty-three million, two hundred eighty-seven thousand, nine hundred twenty".