242178920 has 32 divisors (see below), whose sum is σ = 545416200. Its totient is φ = 96780288.

The previous prime is 242178919. The next prime is 242178929. The reversal of 242178920 is 29871242.

It can be written as a sum of positive squares in 4 ways, for example, as 121925764 + 120253156 = 11042^2 + 10966^2 .

It is not an unprimeable number, because it can be changed into a prime (242178929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54212 + ... + 58508.

Almost surely, 2^242178920 is an apocalyptic number.

242178920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

242178920 is an abundant number, since it is smaller than the sum of its proper divisors (303237280).

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

242178920 is a wasteful number, since it uses less digits than its factorization.

242178920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5717 (or 5713 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 242178920 is about 15562.0988301707. The cubic root of 242178920 is about 623.3215080322.

The spelling of 242178920 in words is "two hundred forty-two million, one hundred seventy-eight thousand, nine hundred twenty".