210442394 has 16 divisors (see below), whose sum is σ = 317993256. Its totient is φ = 104448000.

The previous prime is 210442313. The next prime is 210442399. The reversal of 210442394 is 493244012.

It can be written as a sum of positive squares in 4 ways, for example, as 189420169 + 21022225 = 13763^2 + 4585^2 .

It is not an unprimeable number, because it can be changed into a prime (210442399) 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, 205604 + ... + 206624.

Almost surely, 2^210442394 is an apocalyptic number.

210442394 is a deficient number, since it is larger than the sum of its proper divisors (107550862).

210442394 is a wasteful number, since it uses less digits than its factorization.

210442394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1681.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 210442394 is about 14506.6327588452. The cubic root of 210442394 is about 594.8092922698.

The spelling of 210442394 in words is "two hundred ten million, four hundred forty-two thousand, three hundred ninety-four".