242820628 has 12 divisors (see below), whose sum is σ = 425157460. Its totient is φ = 121347072.

The previous prime is 242820623. The next prime is 242820631. The reversal of 242820628 is 826028242.

It can be written as a sum of positive squares in 2 ways, for example, as 127644804 + 115175824 = 11298^2 + 10732^2 .

It is a junction number, because it is equal to n+sod(n) for n = 242820593 and 242820602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242820623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6573 + ... + 22996.

Almost surely, 2^242820628 is an apocalyptic number.

It is an amenable number.

242820628 is a deficient number, since it is larger than the sum of its proper divisors (182336832).

242820628 is a wasteful number, since it uses less digits than its factorization.

242820628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31626 (or 31624 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 34.

The square root of 242820628 is about 15582.7028464256. The cubic root of 242820628 is about 623.8715664064.

The spelling of 242820628 in words is "two hundred forty-two million, eight hundred twenty thousand, six hundred twenty-eight".