205486730 has 8 divisors (see below), whose sum is σ = 369876132. Its totient is φ = 82194688.

The previous prime is 205486657. The next prime is 205486739. The reversal of 205486730 is 37684502.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 196588441 + 8898289 = 14021^2 + 2983^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (205486739) 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, 10274327 + ... + 10274346.

Almost surely, 2^205486730 is an apocalyptic number.

205486730 is a deficient number, since it is larger than the sum of its proper divisors (164389402).

205486730 is a wasteful number, since it uses less digits than its factorization.

205486730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20548680.

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 205486730 is about 14334.8083349587. The cubic root of 205486730 is about 590.1031419795.

The spelling of 205486730 in words is "two hundred five million, four hundred eighty-six thousand, seven hundred thirty".