206423438 has 24 divisors (see below), whose sum is σ = 341856984. Its totient is φ = 92928960.

The previous prime is 206423417. The next prime is 206423461. The reversal of 206423438 is 834324602.

206423438 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×206423438² = 85221271511479688, which contains 22 as substring.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41345 + ... + 46067.

It is an arithmetic number, because the mean of its divisors is an integer number (14244041).

Almost surely, 2^206423438 is an apocalyptic number.

206423438 is a deficient number, since it is larger than the sum of its proper divisors (135433546).

206423438 is a wasteful number, since it uses less digits than its factorization.

206423438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4820 (or 4779 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 32.

The square root of 206423438 is about 14367.4436835507. The cubic root of 206423438 is about 590.9984415563.

The spelling of 206423438 in words is "two hundred six million, four hundred twenty-three thousand, four hundred thirty-eight".