201439394 has 32 divisors (see below), whose sum is σ = 337947120. Its totient is φ = 89413632.

The previous prime is 201439373. The next prime is 201439397. The reversal of 201439394 is 493934102.

It can be written as a sum of positive squares in 8 ways, for example, as 1075369 + 200364025 = 1037^2 + 14155^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (201439397) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 326174 + ... + 326790.

Almost surely, 2^201439394 is an apocalyptic number.

201439394 is a deficient number, since it is larger than the sum of its proper divisors (136507726).

201439394 is a wasteful number, since it uses less digits than its factorization.

201439394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1094.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 201439394 is about 14192.9346507338. The cubic root of 201439394 is about 586.2031332641.

The spelling of 201439394 in words is "two hundred one million, four hundred thirty-nine thousand, three hundred ninety-four".