190897218 has 24 divisors (see below), whose sum is σ = 435380400. Its totient is φ = 60283224.

The previous prime is 190897193. The next prime is 190897219. The reversal of 190897218 is 812798091.

190897218 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (190897219) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 278748 + ... + 279431.

It is an arithmetic number, because the mean of its divisors is an integer number (18140850).

Almost surely, 2^190897218 is an apocalyptic number.

190897218 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

190897218 is an abundant number, since it is smaller than the sum of its proper divisors (244483182).

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

190897218 is a wasteful number, since it uses less digits than its factorization.

190897218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558206 (or 558203 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 45.

The square root of 190897218 is about 13816.5559384385. Note that the first 3 decimals coincide. The cubic root of 190897218 is about 575.7932019497.

The spelling of 190897218 in words is "one hundred ninety million, eight hundred ninety-seven thousand, two hundred eighteen".