353440042 has 4 divisors (see below), whose sum is σ = 530160066. Its totient is φ = 176720020.

The previous prime is 353440037. The next prime is 353440051. The reversal of 353440042 is 240044353.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 240044353 = 23 ⋅10436711.

It can be written as a sum of positive squares in only one way, i.e., 186022321 + 167417721 = 13639^2 + 12939^2 .

It is a junction number, because it is equal to n+sod(n) for n = 353439989 and 353440016.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 88360009 + ... + 88360012.

Almost surely, 2^353440042 is an apocalyptic number.

353440042 is a deficient number, since it is larger than the sum of its proper divisors (176720024).

353440042 is a wasteful number, since it uses less digits than its factorization.

353440042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176720023.

The product of its (nonzero) digits is 5760, while the sum is 25.

The square root of 353440042 is about 18800.0011170212. The cubic root of 353440042 is about 707.0312073808.

Adding to 353440042 its reverse (240044353), we get a palindrome (593484395).

The spelling of 353440042 in words is "three hundred fifty-three million, four hundred forty thousand, forty-two".