202440393 has 6 divisors (see below), whose sum is σ = 292413914. Its totient is φ = 134960256.

The previous prime is 202440389. The next prime is 202440449. The reversal of 202440393 is 393044202.

It is a happy number.

202440393 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 191767104 + 10673289 = 13848^2 + 3267^2 .

It is not a de Polignac number, because 202440393 - 2² = 202440389 is a prime.

It is a super-2 number, since 2×202440393² = 81964225435988898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202444393) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11246680 + ... + 11246697.

Almost surely, 2^202440393 is an apocalyptic number.

It is an amenable number.

202440393 is a deficient number, since it is larger than the sum of its proper divisors (89973521).

202440393 is a wasteful number, since it uses less digits than its factorization.

202440393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22493383 (or 22493380 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 202440393 is about 14228.1549401179. The cubic root of 202440393 is about 587.1725223690.

Adding to 202440393 its reverse (393044202), we get a palindrome (595484595).

The spelling of 202440393 in words is "two hundred two million, four hundred forty thousand, three hundred ninety-three".