161948190 has 32 divisors (see below), whose sum is σ = 390643200. Its totient is φ = 42967584.

The previous prime is 161948173. The next prime is 161948201. The reversal of 161948190 is 91849161.

It is a super-2 number, since 2×161948190² = 52454432488552200, which contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 7594 + ... + 19533.

It is an arithmetic number, because the mean of its divisors is an integer number (12207600).

Almost surely, 2^161948190 is an apocalyptic number.

161948190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161948190 is an abundant number, since it is smaller than the sum of its proper divisors (228695010).

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

161948190 is a wasteful number, since it uses less digits than its factorization.

161948190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27336.

The product of its (nonzero) digits is 15552, while the sum is 39.

The square root of 161948190 is about 12725.8866095844. The cubic root of 161948190 is about 545.0780574447.

The spelling of 161948190 in words is "one hundred sixty-one million, nine hundred forty-eight thousand, one hundred ninety".