206763780 has 48 divisors (see below), whose sum is σ = 592409664. Its totient is φ = 53854080.

The previous prime is 206763773. The next prime is 206763793. The reversal of 206763780 is 87367602.

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 15 ways as a sum of consecutive naturals, for example, 37491 + ... + 42650.

It is an arithmetic number, because the mean of its divisors is an integer number (12341868).

Almost surely, 2^206763780 is an apocalyptic number.

206763780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206763780 is an abundant number, since it is smaller than the sum of its proper divisors (385645884).

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

206763780 is a wasteful number, since it uses less digits than its factorization.

206763780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80196 (or 80194 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 39.

The square root of 206763780 is about 14379.2830141144. The cubic root of 206763780 is about 591.3230674001.

The spelling of 206763780 in words is "two hundred six million, seven hundred sixty-three thousand, seven hundred eighty".