52640438 has 8 divisors (see below), whose sum is σ = 80255280. Its totient is φ = 25888680.

The previous prime is 52640437. The next prime is 52640443. The reversal of 52640438 is 83404625.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52640437) 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, 215618 + ... + 215861.

It is an arithmetic number, because the mean of its divisors is an integer number (10031910).

Almost surely, 2^52640438 is an apocalyptic number.

52640438 is a deficient number, since it is larger than the sum of its proper divisors (27614842).

52640438 is a wasteful number, since it uses less digits than its factorization.

52640438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431542.

The product of its (nonzero) digits is 23040, while the sum is 32.

The square root of 52640438 is about 7255.3730434761. The cubic root of 52640438 is about 374.7772021744. Note that the first 3 decimals are identical.

The spelling of 52640438 in words is "fifty-two million, six hundred forty thousand, four hundred thirty-eight".