190808190 has 64 divisors (see below), whose sum is σ = 513933120. Its totient is φ = 50371200.

The previous prime is 190808173. The next prime is 190808237. The reversal of 190808190 is 91808091.

It is a super-2 number, since 2×190808190² = 72815530742152200, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23772 + ... + 30768.

It is an arithmetic number, because the mean of its divisors is an integer number (8030205).

Almost surely, 2^190808190 is an apocalyptic number.

190808190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 190808190, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (256966560).

190808190 is an abundant number, since it is smaller than the sum of its proper divisors (323124930).

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

190808190 is a wasteful number, since it uses less digits than its factorization.

190808190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7114 (or 7108 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 36.

The square root of 190808190 is about 13813.3337757400. Note that the first 3 decimals coincide. The cubic root of 190808190 is about 575.7036778789.

Subtracting from 190808190 its reverse (91808091), we obtain a palindrome (99000099).

The spelling of 190808190 in words is "one hundred ninety million, eight hundred eight thousand, one hundred ninety".