53387920 has 40 divisors (see below), whose sum is σ = 126241920. Its totient is φ = 20991360.

The previous prime is 53387881. The next prime is 53387933. The reversal of 53387920 is 2978335.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 53387920.

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 7 ways as a sum of consecutive naturals, for example, 936 + ... + 10375.

It is an arithmetic number, because the mean of its divisors is an integer number (3156048).

Almost surely, 2^53387920 is an apocalyptic number.

It is an amenable number.

53387920 is an abundant number, since it is smaller than the sum of its proper divisors (72854000).

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

53387920 is a wasteful number, since it uses less digits than its factorization.

53387920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11383 (or 11377 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 53387920 is about 7306.7037711953. The cubic root of 53387920 is about 376.5427878147.

The spelling of 53387920 in words is "fifty-three million, three hundred eighty-seven thousand, nine hundred twenty".