206406426 has 16 divisors (see below), whose sum is σ = 419810400. Its totient is φ = 67635888.

The previous prime is 206406391. The next prime is 206406437. The reversal of 206406426 is 624604602.

It is a super-2 number, since 2×206406426² = 85207225388186952, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 206406393 and 206406402.

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, 291181 + ... + 291888.

It is an arithmetic number, because the mean of its divisors is an integer number (26238150).

Almost surely, 2^206406426 is an apocalyptic number.

206406426 is an abundant number, since it is smaller than the sum of its proper divisors (213403974).

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

206406426 is a wasteful number, since it uses less digits than its factorization.

206406426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 583133.

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 206406426 is about 14366.8516384071. The cubic root of 206406426 is about 590.9822057681.

The spelling of 206406426 in words is "two hundred six million, four hundred six thousand, four hundred twenty-six".