205259780 has 24 divisors (see below), whose sum is σ = 470232000. Its totient is φ = 74639840.

The previous prime is 205259741. The next prime is 205259801. The reversal of 205259780 is 87952502.

205259780 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 466280 + ... + 466719.

It is an arithmetic number, because the mean of its divisors is an integer number (19593000).

Almost surely, 2^205259780 is an apocalyptic number.

205259780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205259780 is an abundant number, since it is smaller than the sum of its proper divisors (264972220).

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

205259780 is a wasteful number, since it uses less digits than its factorization.

205259780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 933019 (or 933017 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 38.

The square root of 205259780 is about 14326.8901021820. The cubic root of 205259780 is about 589.8858153059.

The spelling of 205259780 in words is "two hundred five million, two hundred fifty-nine thousand, seven hundred eighty".