168121470 has 64 divisors (see below), whose sum is σ = 443646720. Its totient is φ = 40435200.

The previous prime is 168121453. The next prime is 168121477. The reversal of 168121470 is 74121861.

168121470 = T₂₄₄₅ + T₂₄₄₆ + ... + T₂₄₉₉.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168121477) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 41286 + ... + 45174.

It is an arithmetic number, because the mean of its divisors is an integer number (6931980).

Almost surely, 2^168121470 is an apocalyptic number.

168121470 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 168121470, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (221823360).

168121470 is an abundant number, since it is smaller than the sum of its proper divisors (275525250).

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

168121470 is a wasteful number, since it uses less digits than its factorization.

168121470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4041.

The product of its (nonzero) digits is 2688, while the sum is 30.

The square root of 168121470 is about 12966.1663571003. The cubic root of 168121470 is about 551.9177899519.

The spelling of 168121470 in words is "one hundred sixty-eight million, one hundred twenty-one thousand, four hundred seventy".