206741440 has 28 divisors (see below), whose sum is σ = 492303816. Its totient is φ = 82696448.

The previous prime is 206741419. The next prime is 206741461. The reversal of 206741440 is 44147602.

It is an interprime number because it is at equal distance from previous prime (206741419) and next prime (206741461).

It is a junction number, because it is equal to n+sod(n) for n = 206741399 and 206741408.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 322714 + ... + 323353.

Almost surely, 2^206741440 is an apocalyptic number.

206741440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206741440 is an abundant number, since it is smaller than the sum of its proper divisors (285562376).

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

206741440 is an equidigital number, since it uses as much as digits as its factorization.

206741440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646084 (or 646074 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 206741440 is about 14378.5061811024. The cubic root of 206741440 is about 591.3017699351.

The spelling of 206741440 in words is "two hundred six million, seven hundred forty-one thousand, four hundred forty".