209386342 has 16 divisors (see below), whose sum is σ = 357530112. Its totient is φ = 91037320.

The previous prime is 209386337. The next prime is 209386357. The reversal of 209386342 is 243683902.

It is a super-2 number, since 2×209386342² = 87685280432281928, which 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 7 ways as a sum of consecutive naturals, for example, 206398 + ... + 207409.

It is an arithmetic number, because the mean of its divisors is an integer number (22345632).

Almost surely, 2^209386342 is an apocalyptic number.

209386342 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

209386342 is a deficient number, since it is larger than the sum of its proper divisors (148143770).

209386342 is a wasteful number, since it uses less digits than its factorization.

209386342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413843.

The product of its (nonzero) digits is 62208, while the sum is 37.

The square root of 209386342 is about 14470.1880430076. The cubic root of 209386342 is about 593.8126565531.

The spelling of 209386342 in words is "two hundred nine million, three hundred eighty-six thousand, three hundred forty-two".