206458642 has 16 divisors (see below), whose sum is σ = 353129112. Its totient is φ = 89683200.

The previous prime is 206458633. The next prime is 206458661. The reversal of 206458642 is 246854602.

It can be written as a sum of positive squares in 4 ways, for example, as 177395761 + 29062881 = 13319^2 + 5391^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 233109 + ... + 233992.

Almost surely, 2^206458642 is an apocalyptic number.

206458642 is a deficient number, since it is larger than the sum of its proper divisors (146670470).

206458642 is a wasteful number, since it uses less digits than its factorization.

206458642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467133.

The product of its (nonzero) digits is 92160, while the sum is 37.

The square root of 206458642 is about 14368.6687622758. The cubic root of 206458642 is about 591.0320364599.

It can be divided in two parts, 2064 and 58642, that added together give a palindrome (60706).

The spelling of 206458642 in words is "two hundred six million, four hundred fifty-eight thousand, six hundred forty-two".