52643720 has 32 divisors (see below), whose sum is σ = 118658520. Its totient is φ = 21020160.

The previous prime is 52643693. The next prime is 52643761. The reversal of 52643720 is 2734625.

It can be written as a sum of positive squares in 4 ways, for example, as 39262756 + 13380964 = 6266^2 + 3658^2 .

It is a super-2 number, since 2×52643720² = 5542722510876800, which contains 22 as substring.

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, 37430 + ... + 38810.

Almost surely, 2^52643720 is an apocalyptic number.

It is an amenable number.

52643720 is an abundant number, since it is smaller than the sum of its proper divisors (66014800).

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

52643720 is a wasteful number, since it uses less digits than its factorization.

52643720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2345 (or 2341 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 29.

The square root of 52643720 is about 7255.5992171564. The cubic root of 52643720 is about 374.7849908204.

The spelling of 52643720 in words is "fifty-two million, six hundred forty-three thousand, seven hundred twenty".