169505442 has 24 divisors (see below), whose sum is σ = 369947916. Its totient is φ = 56088576.

The previous prime is 169505437. The next prime is 169505443. The reversal of 169505442 is 244505961.

169505442 is a `hidden beast` number, since 1 + 69 + 50 + 544 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 168974001 + 531441 = 12999^2 + 729^2 .

It is a junction number, because it is equal to n+sod(n) for n = 169505397 and 169505406.

It is not an unprimeable number, because it can be changed into a prime (169505443) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31903 + ... + 36834.

Almost surely, 2^169505442 is an apocalyptic number.

169505442 is an abundant number, since it is smaller than the sum of its proper divisors (200442474).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

169505442 is a wasteful number, since it uses less digits than its factorization.

169505442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68882 (or 68879 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 169505442 is about 13019.4255633649. The cubic root of 169505442 is about 553.4281112952.

The spelling of 169505442 in words is "one hundred sixty-nine million, five hundred five thousand, four hundred forty-two".