202040434 has 4 divisors (see below), whose sum is σ = 303060654. Its totient is φ = 101020216.

The previous prime is 202040431. The next prime is 202040459. The reversal of 202040434 is 434040202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 434040202 = 2 ⋅217020101.

It can be written as a sum of positive squares in only one way, i.e., 191130625 + 10909809 = 13825^2 + 3303^2 .

It is not an unprimeable number, because it can be changed into a prime (202040431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50510107 + ... + 50510110.

Almost surely, 2^202040434 is an apocalyptic number.

202040434 is a deficient number, since it is larger than the sum of its proper divisors (101020220).

202040434 is a wasteful number, since it uses less digits than its factorization.

202040434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101020219.

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 202040434 is about 14214.0927955322. The cubic root of 202040434 is about 586.7855775809.

Adding to 202040434 its reverse (434040202), we get a palindrome (636080636).

The spelling of 202040434 in words is "two hundred two million, forty thousand, four hundred thirty-four".