205570738 has 4 divisors (see below), whose sum is σ = 308356110. Its totient is φ = 102785368.

The previous prime is 205570727. The next prime is 205570741. The reversal of 205570738 is 837075502.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 182979729 + 22591009 = 13527^2 + 4753^2 .

It is a junction number, because it is equal to n+sod(n) for n = 205570697 and 205570706.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51392683 + ... + 51392686.

Almost surely, 2^205570738 is an apocalyptic number.

205570738 is a deficient number, since it is larger than the sum of its proper divisors (102785372).

205570738 is a wasteful number, since it uses less digits than its factorization.

205570738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102785371.

The product of its (nonzero) digits is 58800, while the sum is 37.

The square root of 205570738 is about 14337.7382456230. The cubic root of 205570738 is about 590.1835472213.

The spelling of 205570738 in words is "two hundred five million, five hundred seventy thousand, seven hundred thirty-eight".