242828991 has 6 divisors (see below), whose sum is σ = 350753000. Its totient is φ = 161885988.

The previous prime is 242828981. The next prime is 242829007. The reversal of 242828991 is 199828242.

It is a happy number.

It is not a de Polignac number, because 242828991 - 2⁵ = 242828959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242828941) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13490491 + ... + 13490508.

Almost surely, 2^242828991 is an apocalyptic number.

242828991 is a deficient number, since it is larger than the sum of its proper divisors (107924009).

242828991 is a wasteful number, since it uses less digits than its factorization.

242828991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26981005 (or 26981002 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 242828991 is about 15582.9711865228. The cubic root of 242828991 is about 623.8787285903.

The spelling of 242828991 in words is "two hundred forty-two million, eight hundred twenty-eight thousand, nine hundred ninety-one".