52640506 has 8 divisors (see below), whose sum is σ = 78993684. Its totient is φ = 26309280.

The previous prime is 52640503. The next prime is 52640513. The reversal of 52640506 is 60504625.

It can be written as a sum of positive squares in 2 ways, for example, as 47734281 + 4906225 = 6909^2 + 2215^2 .

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

It is not an unprimeable number, because it can be changed into a prime (52640503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3366 + ... + 10798.

Almost surely, 2^52640506 is an apocalyptic number.

52640506 is a deficient number, since it is larger than the sum of its proper divisors (26353178).

52640506 is a wasteful number, since it uses less digits than its factorization.

52640506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10976.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 52640506 is about 7255.3777296568. The cubic root of 52640506 is about 374.7773635512. Note that the first 3 decimals are identical.

The spelling of 52640506 in words is "fifty-two million, six hundred forty thousand, five hundred six".