209086842 has 32 divisors (see below), whose sum is σ = 444102912. Its totient is φ = 65398784.

The previous prime is 209086837. The next prime is 209086901. The reversal of 209086842 is 248680902.

It is a self number, because there is not a number n which added to its sum of digits gives 209086842.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33103 + ... + 38909.

It is an arithmetic number, because the mean of its divisors is an integer number (13878216).

Almost surely, 2^209086842 is an apocalyptic number.

209086842 is an abundant number, since it is smaller than the sum of its proper divisors (235016070).

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

209086842 is a wasteful number, since it uses less digits than its factorization.

209086842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6182.

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 209086842 is about 14459.8354762425. The cubic root of 209086842 is about 593.5293974637.

The spelling of 209086842 in words is "two hundred nine million, eighty-six thousand, eight hundred forty-two".