52640386 has 16 divisors (see below), whose sum is σ = 80288640. Its totient is φ = 25880400.

The previous prime is 52640363. The next prime is 52640389. The reversal of 52640386 is 68304625.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (52640389) 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 7 ways as a sum of consecutive naturals, for example, 49561 + ... + 50611.

It is an arithmetic number, because the mean of its divisors is an integer number (5018040).

Almost surely, 2^52640386 is an apocalyptic number.

52640386 is a deficient number, since it is larger than the sum of its proper divisors (27648254).

52640386 is a wasteful number, since it uses less digits than its factorization.

52640386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1449.

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 52640386 is about 7255.3694599241. The cubic root of 52640386 is about 374.7770787685. Note that the first 3 decimals are identical.

The spelling of 52640386 in words is "fifty-two million, six hundred forty thousand, three hundred eighty-six".