169540890 has 32 divisors (see below), whose sum is σ = 409159296. Its totient is φ = 44959680.

The previous prime is 169540871. The next prime is 169540937. The reversal of 169540890 is 98045961.

It is a super-2 number, since 2×169540890² = 57488226763984200, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10182 + ... + 21041.

It is an arithmetic number, because the mean of its divisors is an integer number (12786228).

Almost surely, 2^169540890 is an apocalyptic number.

169540890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

169540890 is an abundant number, since it is smaller than the sum of its proper divisors (239618406).

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

169540890 is a wasteful number, since it uses less digits than its factorization.

169540890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31414.

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 169540890 is about 13020.7868425837. The cubic root of 169540890 is about 553.4666873473.

The spelling of 169540890 in words is "one hundred sixty-nine million, five hundred forty thousand, eight hundred ninety".