209192485438 has 8 divisors (see below), whose sum is σ = 313810016040. Its totient is φ = 104589146760.

The previous prime is 209192485379. The next prime is 209192485471. The reversal of 209192485438 is 834584291902.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×209192485438² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3511053 + ... + 3570136.

It is an arithmetic number, because the mean of its divisors is an integer number (39226252005).

Almost surely, 2^209192485438 is an apocalyptic number.

209192485438 is a deficient number, since it is larger than the sum of its proper divisors (104617530602).

209192485438 is a wasteful number, since it uses less digits than its factorization.

209192485438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7095962.

The product of its (nonzero) digits is 4976640, while the sum is 55.

The spelling of 209192485438 in words is "two hundred nine billion, one hundred ninety-two million, four hundred eighty-five thousand, four hundred thirty-eight".