206424140 has 24 divisors (see below), whose sum is σ = 466836720. Its totient is φ = 76218048.

The previous prime is 206424109. The next prime is 206424143. The reversal of 206424140 is 41424602.

It is a super-2 number, since 2×206424140² = 85221851149479200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (206424143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 396710 + ... + 397229.

It is an arithmetic number, because the mean of its divisors is an integer number (19451530).

Almost surely, 2^206424140 is an apocalyptic number.

206424140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206424140 is an abundant number, since it is smaller than the sum of its proper divisors (260412580).

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

206424140 is a wasteful number, since it uses less digits than its factorization.

206424140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 793961 (or 793959 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 206424140 is about 14367.4681137631. The cubic root of 206424140 is about 590.9991115068. Note that the first 3 decimals are identical.

Adding to 206424140 its reverse (41424602), we get a palindrome (247848742).

The spelling of 206424140 in words is "two hundred six million, four hundred twenty-four thousand, one hundred forty".