242469978 has 16 divisors (see below), whose sum is σ = 485565600. Its totient is φ = 80719056.

The previous prime is 242469973. The next prime is 242469989. The reversal of 242469978 is 879964242.

It is a self number, because there is not a number n which added to its sum of digits gives 242469978.

It is not an unprimeable number, because it can be changed into a prime (242469971) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20953 + ... + 30396.

It is an arithmetic number, because the mean of its divisors is an integer number (30347850).

Almost surely, 2^242469978 is an apocalyptic number.

242469978 is an abundant number, since it is smaller than the sum of its proper divisors (243095622).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

242469978 is a wasteful number, since it uses less digits than its factorization.

242469978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52141.

The product of its digits is 1741824, while the sum is 51.

The square root of 242469978 is about 15571.4475242349. The cubic root of 242469978 is about 623.5711169855.

The spelling of 242469978 in words is "two hundred forty-two million, four hundred sixty-nine thousand, nine hundred seventy-eight".