342640442 has 16 divisors (see below), whose sum is σ = 527150592. Its totient is φ = 166966800.

The previous prime is 342640409. The next prime is 342640531. The reversal of 342640442 is 244046243.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5303 + ... + 26709.

It is an arithmetic number, because the mean of its divisors is an integer number (32946912).

Almost surely, 2^342640442 is an apocalyptic number.

342640442 is a deficient number, since it is larger than the sum of its proper divisors (184510150).

342640442 is a wasteful number, since it uses less digits than its factorization.

342640442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21613.

The product of its (nonzero) digits is 18432, while the sum is 29.

The square root of 342640442 is about 18510.5494786081. The cubic root of 342640442 is about 699.7553172030.

Adding to 342640442 its reverse (244046243), we get a palindrome (586686685).

The spelling of 342640442 in words is "three hundred forty-two million, six hundred forty thousand, four hundred forty-two".