53720445 has 8 divisors (see below), whose sum is σ = 85952736. Its totient is φ = 28650896.

The previous prime is 53720437. The next prime is 53720449. The reversal of 53720445 is 54402735.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 53720445 - 2³ = 53720437 is a prime.

It is a super-3 number, since 3×53720445³ (a number of 24 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53720449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1790667 + ... + 1790696.

It is an arithmetic number, because the mean of its divisors is an integer number (10744092).

Almost surely, 2^53720445 is an apocalyptic number.

It is an amenable number.

53720445 is a deficient number, since it is larger than the sum of its proper divisors (32232291).

53720445 is a wasteful number, since it uses less digits than its factorization.

53720445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3581371.

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

The square root of 53720445 is about 7329.4232378817. The cubic root of 53720445 is about 377.3229320309.

The spelling of 53720445 in words is "fifty-three million, seven hundred twenty thousand, four hundred forty-five".