161307190 has 64 divisors (see below), whose sum is σ = 329598720. Its totient is φ = 56327040.

The previous prime is 161307187. The next prime is 161307191. The reversal of 161307190 is 91703161.

161307190 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161307190² = 52040019091392200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161307191) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 316656 + ... + 317164.

It is an arithmetic number, because the mean of its divisors is an integer number (5149980).

Almost surely, 2^161307190 is an apocalyptic number.

161307190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161307190 is an abundant number, since it is smaller than the sum of its proper divisors (168291530).

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

161307190 is a wasteful number, since it uses less digits than its factorization.

161307190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637.

The product of its (nonzero) digits is 1134, while the sum is 28.

The square root of 161307190 is about 12700.6767536222. The cubic root of 161307190 is about 544.3579567216.

It can be divided in two parts, 1613071 and 90, that added together give a palindrome (1613161).

The spelling of 161307190 in words is "one hundred sixty-one million, three hundred seven thousand, one hundred ninety".