1647208252 has 12 divisors (see below), whose sum is σ = 2885785056. Its totient is φ = 822698240.

The previous prime is 1647208243. The next prime is 1647208271. The reversal of 1647208252 is 2528027461.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 222373 + ... + 229660.

It is an arithmetic number, because the mean of its divisors is an integer number (240482088).

Almost surely, 2^1647208252 is an apocalyptic number.

It is an amenable number.

1647208252 is a deficient number, since it is larger than the sum of its proper divisors (1238576804).

1647208252 is a wasteful number, since it uses less digits than its factorization.

1647208252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452948 (or 452946 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 37.

The square root of 1647208252 is about 40585.8134327748. The cubic root of 1647208252 is about 1180.9989271748.

The spelling of 1647208252 in words is "one billion, six hundred forty-seven million, two hundred eight thousand, two hundred fifty-two".