206428194 has 96 divisors (see below), whose sum is σ = 540933120. Its totient is φ = 55641600.

The previous prime is 206428129. The next prime is 206428237. The reversal of 206428194 is 491824602.

206428194 is a `hidden beast` number, since 2 + 0 + 642 + 8 + 1 + 9 + 4 = 666.

206428194 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×206428194² = 85225198556203272, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 159502 + ... + 160790.

It is an arithmetic number, because the mean of its divisors is an integer number (5634720).

Almost surely, 2^206428194 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 206428194, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (270466560).

206428194 is an abundant number, since it is smaller than the sum of its proper divisors (334504926).

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

206428194 is a wasteful number, since it uses less digits than its factorization.

206428194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1376 (or 1373 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 206428194 is about 14367.6091956874. The cubic root of 206428194 is about 591.0029803933.

The spelling of 206428194 in words is "two hundred six million, four hundred twenty-eight thousand, one hundred ninety-four".