161439192 has 24 divisors (see below), whose sum is σ = 437231340. Its totient is φ = 53813040.

The previous prime is 161439101. The next prime is 161439193. The reversal of 161439192 is 291934161.

It is a happy number.

161439192 is a `hidden beast` number, since 1 + 614 + 39 + 1 + 9 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×161439192² = 52125225427225728, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161439193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1121034 + ... + 1121177.

Almost surely, 2^161439192 is an apocalyptic number.

161439192 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161439192 is an abundant number, since it is smaller than the sum of its proper divisors (275792148).

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

161439192 is a wasteful number, since it uses less digits than its factorization.

161439192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2242223 (or 2242216 counting only the distinct ones).

The product of its digits is 11664, while the sum is 36.

The square root of 161439192 is about 12705.8723431333. The cubic root of 161439192 is about 544.5064038082.

The spelling of 161439192 in words is "one hundred sixty-one million, four hundred thirty-nine thousand, one hundred ninety-two".