206405342 has 16 divisors (see below), whose sum is σ = 363735792. Its totient is φ = 86603520.

The previous prime is 206405333. The next prime is 206405389. The reversal of 206405342 is 243504602.

It is a super-2 number, since 2×206405342² = 85206330412273928, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

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, 360563 + ... + 361134.

It is an arithmetic number, because the mean of its divisors is an integer number (22733487).

Almost surely, 2^206405342 is an apocalyptic number.

206405342 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

206405342 is a deficient number, since it is larger than the sum of its proper divisors (157330450).

206405342 is a wasteful number, since it uses less digits than its factorization.

206405342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721723.

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 206405342 is about 14366.8139126252. The cubic root of 206405342 is about 590.9811711978.

Adding to 206405342 its reverse (243504602), we get a palindrome (449909944).

The spelling of 206405342 in words is "two hundred six million, four hundred five thousand, three hundred forty-two".