146169220 has 36 divisors (see below), whose sum is σ = 311151204. Its totient is φ = 57673600.

The previous prime is 146169211. The next prime is 146169241. The reversal of 146169220 is 22961641.

It can be written as a sum of positive squares in 6 ways, for example, as 13089924 + 133079296 = 3618^2 + 11536^2 .

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 11 ways as a sum of consecutive naturals, for example, 543246 + ... + 543514.

It is an arithmetic number, because the mean of its divisors is an integer number (8643089).

Almost surely, 2^146169220 is an apocalyptic number.

146169220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

146169220 is an abundant number, since it is smaller than the sum of its proper divisors (164981984).

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

146169220 is a wasteful number, since it uses less digits than its factorization.

146169220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648 (or 377 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 146169220 is about 12090.0463191834. The cubic root of 146169220 is about 526.7671006099.

The spelling of 146169220 in words is "one hundred forty-six million, one hundred sixty-nine thousand, two hundred twenty".