206931140 has 48 divisors (see below), whose sum is σ = 495521712. Its totient is φ = 71909376.

The previous prime is 206931097. The next prime is 206931149. The reversal of 206931140 is 41139602.

It can be written as a sum of positive squares in 8 ways, for example, as 31684 + 206899456 = 178^2 + 14384^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (206931149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18989 + ... + 27828.

It is an arithmetic number, because the mean of its divisors is an integer number (10323369).

Almost surely, 2^206931140 is an apocalyptic number.

206931140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206931140 is an abundant number, since it is smaller than the sum of its proper divisors (288590572).

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

206931140 is a wasteful number, since it uses less digits than its factorization.

206931140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46856 (or 46854 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 206931140 is about 14385.1013204635. The cubic root of 206931140 is about 591.4825684811.

The spelling of 206931140 in words is "two hundred six million, nine hundred thirty-one thousand, one hundred forty".