52640427 has 8 divisors (see below), whose sum is σ = 80214016. Its totient is φ = 30080232.

The previous prime is 52640417. The next prime is 52640437. The reversal of 52640427 is 72404625.

It is an interprime number because it is at equal distance from previous prime (52640417) and next prime (52640437).

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

It is not a de Polignac number, because 52640427 - 2⁶ = 52640363 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 52640394 and 52640403.

It is not an unprimeable number, because it can be changed into a prime (52640417) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1253323 + ... + 1253364.

It is an arithmetic number, because the mean of its divisors is an integer number (10026752).

Almost surely, 2^52640427 is an apocalyptic number.

52640427 is a deficient number, since it is larger than the sum of its proper divisors (27573589).

52640427 is a wasteful number, since it uses less digits than its factorization.

52640427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2506697.

The product of its (nonzero) digits is 13440, while the sum is 30.

The square root of 52640427 is about 7255.3722854172. The cubic root of 52640427 is about 374.7771760693. Note that the first 3 decimals are identical.

The spelling of 52640427 in words is "fifty-two million, six hundred forty thousand, four hundred twenty-seven".