52640985 has 16 divisors (see below), whose sum is σ = 84326400. Its totient is φ = 28041600.

The previous prime is 52640981. The next prime is 52640999. The reversal of 52640985 is 58904625.

It is not a de Polignac number, because 52640985 - 2² = 52640981 is a prime.

It is not an unprimeable number, because it can be changed into a prime (52640981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15741 + ... + 18789.

It is an arithmetic number, because the mean of its divisors is an integer number (5270400).

Almost surely, 2^52640985 is an apocalyptic number.

It is an amenable number.

52640985 is a deficient number, since it is larger than the sum of its proper divisors (31685415).

52640985 is a wasteful number, since it uses less digits than its factorization.

52640985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4208.

The product of its (nonzero) digits is 86400, while the sum is 39.

The square root of 52640985 is about 7255.4107395791. The cubic root of 52640985 is about 374.7785003046.

The spelling of 52640985 in words is "fifty-two million, six hundred forty thousand, nine hundred eighty-five".