169461990 has 32 divisors (see below), whose sum is σ = 451899360. Its totient is φ = 45189792.

The previous prime is 169461959. The next prime is 169462003. The reversal of 169461990 is 99164961.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 313549 + ... + 314088.

It is an arithmetic number, because the mean of its divisors is an integer number (14121855).

Almost surely, 2^169461990 is an apocalyptic number.

169461990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

169461990 is an abundant number, since it is smaller than the sum of its proper divisors (282437370).

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

169461990 is a wasteful number, since it uses less digits than its factorization.

169461990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 627653 (or 627647 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 45.

The square root of 169461990 is about 13017.7567191894. The cubic root of 169461990 is about 553.3808176053.

The spelling of 169461990 in words is "one hundred sixty-nine million, four hundred sixty-one thousand, nine hundred ninety".