209696190 has 64 divisors (see below), whose sum is σ = 581333760. Its totient is φ = 47843840.

The previous prime is 209696171. The next prime is 209696191. The reversal of 209696190 is 91696902.

It is a happy number.

209696190 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 2×209696190² = 87944984201032200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209696191) 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, 13080 + ... + 24299.

It is an arithmetic number, because the mean of its divisors is an integer number (9083340).

Almost surely, 2^209696190 is an apocalyptic number.

209696190 is an abundant number, since it is smaller than the sum of its proper divisors (371637570).

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

209696190 is a wasteful number, since it uses less digits than its factorization.

209696190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37417.

The product of its (nonzero) digits is 52488, while the sum is 42.

The square root of 209696190 is about 14480.8905112911. The cubic root of 209696190 is about 594.1054183770.

The spelling of 209696190 in words is "two hundred nine million, six hundred ninety-six thousand, one hundred ninety".