242779978 has 16 divisors (see below), whose sum is σ = 425874240. Its totient is φ = 101628576.

The previous prime is 242779963. The next prime is 242779981. The reversal of 242779978 is 879977242.

It is a happy number.

242779978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 201043 + ... + 202246.

It is an arithmetic number, because the mean of its divisors is an integer number (26617140).

Almost surely, 2^242779978 is an apocalyptic number.

242779978 is a deficient number, since it is larger than the sum of its proper divisors (183094262).

242779978 is a wasteful number, since it uses less digits than its factorization.

242779978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403341.

The product of its digits is 3556224, while the sum is 55.

The square root of 242779978 is about 15581.3984609855. The cubic root of 242779978 is about 623.8367508655.

The spelling of 242779978 in words is "two hundred forty-two million, seven hundred seventy-nine thousand, nine hundred seventy-eight".