169906428 has 36 divisors (see below), whose sum is σ = 448161168. Its totient is φ = 54172800.

The previous prime is 169906423. The next prime is 169906433. The reversal of 169906428 is 824609961.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (169906423) and next prime (169906433).

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (169906421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 101773 + ... + 103428.

Almost surely, 2^169906428 is an apocalyptic number.

169906428 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

169906428 is an abundant number, since it is smaller than the sum of its proper divisors (278254740).

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

169906428 is a wasteful number, since it uses less digits than its factorization.

169906428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205234 (or 205229 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 169906428 is about 13034.8159940983. The cubic root of 169906428 is about 553.8641684133.

The spelling of 169906428 in words is "one hundred sixty-nine million, nine hundred six thousand, four hundred twenty-eight".