205289394 has 16 divisors (see below), whose sum is σ = 421675968. Its totient is φ = 66580272.

The previous prime is 205289393. The next prime is 205289423. The reversal of 205289394 is 493982502.

It is not an unprimeable number, because it can be changed into a prime (205289393) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 462142 + ... + 462585.

It is an arithmetic number, because the mean of its divisors is an integer number (26354748).

Almost surely, 2^205289394 is an apocalyptic number.

205289394 is an abundant number, since it is smaller than the sum of its proper divisors (216386574).

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

205289394 is a wasteful number, since it uses less digits than its factorization.

205289394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 924769.

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 205289394 is about 14327.9235760106. The cubic root of 205289394 is about 589.9141826729.

The spelling of 205289394 in words is "two hundred five million, two hundred eighty-nine thousand, three hundred ninety-four".