242140440394 has 16 divisors (see below), whose sum is σ = 363586119048. Its totient is φ = 120945111552.

The previous prime is 242140440337. The next prime is 242140440401. The reversal of 242140440394 is 493044041242.

It can be written as a sum of positive squares in 4 ways, for example, as 238109841225 + 4030599169 = 487965^2 + 63487^2 .

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, 17986914 + ... + 18000370.

Almost surely, 2^242140440394 is an apocalyptic number.

242140440394 is a deficient number, since it is larger than the sum of its proper divisors (121445678654).

242140440394 is a wasteful number, since it uses less digits than its factorization.

242140440394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22089.

The product of its (nonzero) digits is 110592, while the sum is 37.

The spelling of 242140440394 in words is "two hundred forty-two billion, one hundred forty million, four hundred forty thousand, three hundred ninety-four".