242028381 has 32 divisors (see below), whose sum is σ = 378864640. Its totient is φ = 134555904.

The previous prime is 242028373. The next prime is 242028383. The reversal of 242028381 is 183820242.

It is not a de Polignac number, because 242028381 - 2³ = 242028373 is a prime.

It is a super-2 number, since 2×242028381² = 117155474418962322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242028383) 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 31 ways as a sum of consecutive naturals, for example, 390690 + ... + 391308.

It is an arithmetic number, because the mean of its divisors is an integer number (11839520).

Almost surely, 2^242028381 is an apocalyptic number.

242028381 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

242028381 is a deficient number, since it is larger than the sum of its proper divisors (136836259).

242028381 is a wasteful number, since it uses less digits than its factorization.

242028381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1105.

The product of its (nonzero) digits is 6144, while the sum is 30.

The square root of 242028381 is about 15557.2613592496. The cubic root of 242028381 is about 623.1923285455.

The spelling of 242028381 in words is "two hundred forty-two million, twenty-eight thousand, three hundred eighty-one".