52720668 has 324 divisors, whose sum is σ = 193163880. Its totient is φ = 11975040.

The previous prime is 52720667. The next prime is 52720697. The reversal of 52720668 is 86602725.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52720667) by changing a digit.

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 107 ways as a sum of consecutive naturals, for example, 2774763 + ... + 2774781.

Almost surely, 2^52720668 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 52720668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96581940).

52720668 is an abundant number, since it is smaller than the sum of its proper divisors (140443212).

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

52720668 is a wasteful number, since it uses less digits than its factorization.

52720668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78 (or 55 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 52720668 is about 7260.8999442218. The cubic root of 52720668 is about 374.9675065179.

The spelling of 52720668 in words is "fifty-two million, seven hundred twenty thousand, six hundred sixty-eight".