168449190 has 64 divisors (see below), whose sum is σ = 497581056. Its totient is φ = 35540352.

The previous prime is 168449173. The next prime is 168449191. The reversal of 168449190 is 91944861.

It is a super-2 number, since 2×168449190² = 56750259223312200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168449191) 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 31 ways as a sum of consecutive naturals, for example, 28122 + ... + 33581.

It is an arithmetic number, because the mean of its divisors is an integer number (7774704).

Almost surely, 2^168449190 is an apocalyptic number.

168449190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

168449190 is an abundant number, since it is smaller than the sum of its proper divisors (329131866).

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

168449190 is a wasteful number, since it uses less digits than its factorization.

168449190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61733.

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 168449190 is about 12978.7977101117. The cubic root of 168449190 is about 552.2761758632.

The spelling of 168449190 in words is "one hundred sixty-eight million, four hundred forty-nine thousand, one hundred ninety".