205789872 has 20 divisors (see below), whose sum is σ = 531623960. Its totient is φ = 68596608.

The previous prime is 205789849. The next prime is 205789877. The reversal of 205789872 is 278987502.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 4287289 = 205789872 / (2 + 0 + 5 + 7 + 8 + 9 + 8 + 7 + 2).

It is not an unprimeable number, because it can be changed into a prime (205789877) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2143597 + ... + 2143692.

It is an arithmetic number, because the mean of its divisors is an integer number (26581198).

Almost surely, 2^205789872 is an apocalyptic number.

It is an amenable number.

205789872 is an abundant number, since it is smaller than the sum of its proper divisors (325834088).

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

205789872 is a wasteful number, since it uses less digits than its factorization.

205789872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4287300 (or 4287294 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 48.

The square root of 205789872 is about 14345.3780710025. The cubic root of 205789872 is about 590.3931804208.

The spelling of 205789872 in words is "two hundred five million, seven hundred eighty-nine thousand, eight hundred seventy-two".