52857649 has 4 divisors (see below), whose sum is σ = 56923636. Its totient is φ = 48791664.

The previous prime is 52857619. The next prime is 52857653. The reversal of 52857649 is 94675825.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5688225 + 47169424 = 2385^2 + 6868^2 .

It is a cyclic number.

It is not a de Polignac number, because 52857649 - 2⁵ = 52857617 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 52857599 and 52857608.

It is not an unprimeable number, because it can be changed into a prime (52857619) 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, 2032974 + ... + 2032999.

It is an arithmetic number, because the mean of its divisors is an integer number (14230909).

Almost surely, 2^52857649 is an apocalyptic number.

It is an amenable number.

52857649 is a deficient number, since it is larger than the sum of its proper divisors (4065987).

52857649 is a wasteful number, since it uses less digits than its factorization.

52857649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4065986.

The product of its digits is 604800, while the sum is 46.

The square root of 52857649 is about 7270.3266088945. The cubic root of 52857649 is about 375.2919776422.

The spelling of 52857649 in words is "fifty-two million, eight hundred fifty-seven thousand, six hundred forty-nine".