206430890 has 16 divisors (see below), whose sum is σ = 373524480. Its totient is φ = 82139280.

The previous prime is 206430883. The next prime is 206430901. The reversal of 206430890 is 98034602.

206430890 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 2×206430890² = 85227424692384200, which contains 22 as substring.

It is a Curzon 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, 52130 + ... + 55949.

It is an arithmetic number, because the mean of its divisors is an integer number (23345280).

Almost surely, 2^206430890 is an apocalyptic number.

206430890 is a deficient number, since it is larger than the sum of its proper divisors (167093590).

206430890 is a wasteful number, since it uses less digits than its factorization.

206430890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108277.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 206430890 is about 14367.7030175321. The cubic root of 206430890 is about 591.0055532607.

The spelling of 206430890 in words is "two hundred six million, four hundred thirty thousand, eight hundred ninety".