205487428 has 24 divisors (see below), whose sum is σ = 376084800. Its totient is φ = 98054880.

The previous prime is 205487389. The next prime is 205487461. The reversal of 205487428 is 824784502.

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, 42898 + ... + 47446.

It is an arithmetic number, because the mean of its divisors is an integer number (15670200).

Almost surely, 2^205487428 is an apocalyptic number.

It is an amenable number.

205487428 is a deficient number, since it is larger than the sum of its proper divisors (170597372).

205487428 is a wasteful number, since it uses less digits than its factorization.

205487428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5067 (or 5065 counting only the distinct ones).

The product of its (nonzero) digits is 143360, while the sum is 40.

The square root of 205487428 is about 14334.8326812698. The cubic root of 205487428 is about 590.1038101354.

The spelling of 205487428 in words is "two hundred five million, four hundred eighty-seven thousand, four hundred twenty-eight".