242140439978 has 8 divisors (see below), whose sum is σ = 363214753668. Its totient is φ = 121068855424.

The previous prime is 242140439963. The next prime is 242140439993. The reversal of 242140439978 is 879934041242.

It is an interprime number because it is at equal distance from previous prime (242140439963) and next prime (242140439993).

It can be written as a sum of positive squares in 2 ways, for example, as 235037827249 + 7102612729 = 484807^2 + 84277^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 443801 + ... + 825372.

Almost surely, 2^242140439978 is an apocalyptic number.

242140439978 is a deficient number, since it is larger than the sum of its proper divisors (121074313690).

242140439978 is a wasteful number, since it uses less digits than its factorization.

242140439978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1364568.

The product of its (nonzero) digits is 3483648, while the sum is 53.

The spelling of 242140439978 in words is "two hundred forty-two billion, one hundred forty million, four hundred thirty-nine thousand, nine hundred seventy-eight".