168390532 has 6 divisors (see below), whose sum is σ = 294683438. Its totient is φ = 84195264.

The previous prime is 168390529. The next prime is 168390539. The reversal of 168390532 is 235093861.

It can be written as a sum of positive squares in only one way, i.e., 86415616 + 81974916 = 9296^2 + 9054^2 .

It is a junction number, because it is equal to n+sod(n) for n = 168390491 and 168390500.

It is not an unprimeable number, because it can be changed into a prime (168390539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21048813 + ... + 21048820.

Almost surely, 2^168390532 is an apocalyptic number.

It is an amenable number.

168390532 is a deficient number, since it is larger than the sum of its proper divisors (126292906).

168390532 is a wasteful number, since it uses less digits than its factorization.

168390532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42097637 (or 42097635 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 168390532 is about 12976.5377508795. The cubic root of 168390532 is about 552.2120632032.

The spelling of 168390532 in words is "one hundred sixty-eight million, three hundred ninety thousand, five hundred thirty-two".