53006720 has 128 divisors (see below), whose sum is σ = 142914240. Its totient is φ = 18653184.

The previous prime is 53006699. The next prime is 53006729. The reversal of 53006720 is 2760035.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53006729) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 191222 + ... + 191498.

Almost surely, 2^53006720 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 53006720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71457120).

53006720 is an abundant number, since it is smaller than the sum of its proper divisors (89907520).

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

53006720 is a wasteful number, since it uses less digits than its factorization.

53006720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332 (or 320 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 23.

The square root of 53006720 is about 7280.5714061466. The cubic root of 53006720 is about 375.6444503740.

Adding to 53006720 its reverse (2760035), we get a palindrome (55766755).

The spelling of 53006720 in words is "fifty-three million, six thousand, seven hundred twenty".