229161990 has 16 divisors (see below), whose sum is σ = 549988848. Its totient is φ = 61109856.

The previous prime is 229161953. The next prime is 229162001. The reversal of 229161990 is 99161922.

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 7 ways as a sum of consecutive naturals, for example, 3819337 + ... + 3819396.

It is an arithmetic number, because the mean of its divisors is an integer number (34374303).

Almost surely, 2^229161990 is an apocalyptic number.

229161990 is an abundant number, since it is smaller than the sum of its proper divisors (320826858).

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

229161990 is a wasteful number, since it uses less digits than its factorization.

229161990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7638743.

The product of its (nonzero) digits is 17496, while the sum is 39.

The square root of 229161990 is about 15138.0973044831. The cubic root of 229161990 is about 611.9475423874.

The spelling of 229161990 in words is "two hundred twenty-nine million, one hundred sixty-one thousand, nine hundred ninety".