168349290 has 16 divisors (see below), whose sum is σ = 404038368. Its totient is φ = 44893136.

The previous prime is 168349261. The next prime is 168349319. The reversal of 168349290 is 92943861.

It is an interprime number because it is at equal distance from previous prime (168349261) and next prime (168349319).

It is a nialpdrome in base 15.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2805792 + ... + 2805851.

It is an arithmetic number, because the mean of its divisors is an integer number (25252398).

Almost surely, 2^168349290 is an apocalyptic number.

168349290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

168349290 is an abundant number, since it is smaller than the sum of its proper divisors (235689078).

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

168349290 is a wasteful number, since it uses less digits than its factorization.

168349290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5611653.

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 168349290 is about 12974.9485548113. The cubic root of 168349290 is about 552.1669771579.

The spelling of 168349290 in words is "one hundred sixty-eight million, three hundred forty-nine thousand, two hundred ninety".