391536052 has 6 divisors (see below), whose sum is σ = 685188098. Its totient is φ = 195768024.

The previous prime is 391536029. The next prime is 391536053. The reversal of 391536052 is 250635193.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 286760356 + 104775696 = 16934^2 + 10236^2 .

It is a junction number, because it is equal to n+sod(n) for n = 391535999 and 391536017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (391536053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48942003 + ... + 48942010.

Almost surely, 2^391536052 is an apocalyptic number.

It is an amenable number.

391536052 is a deficient number, since it is larger than the sum of its proper divisors (293652046).

391536052 is a wasteful number, since it uses less digits than its factorization.

391536052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97884017 (or 97884015 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 34.

The square root of 391536052 is about 19787.2699481257. The cubic root of 391536052 is about 731.5722988442.

The spelling of 391536052 in words is "three hundred ninety-one million, five hundred thirty-six thousand, fifty-two".