53342720 has 80 divisors (see below), whose sum is σ = 130223808. Its totient is φ = 20951040.

The previous prime is 53342717. The next prime is 53342741. The reversal of 53342720 is 2724335.

It is a tau number, because it is divible by the number of its divisors (80).

It is a self number, because there is not a number n which added to its sum of digits gives 53342720.

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, 171365 + ... + 171675.

Almost surely, 2^53342720 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 53342720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65111904).

53342720 is an abundant number, since it is smaller than the sum of its proper divisors (76881088).

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

53342720 is an equidigital number, since it uses as much as digits as its factorization.

53342720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401 (or 385 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 26.

The square root of 53342720 is about 7303.6100662618. The cubic root of 53342720 is about 376.4364932358.

The spelling of 53342720 in words is "fifty-three million, three hundred forty-two thousand, seven hundred twenty".