242398989 has 12 divisors (see below), whose sum is σ = 400150816. Its totient is φ = 138513672.

The previous prime is 242398973. The next prime is 242398991. The reversal of 242398989 is 989893242.

It is a happy number.

242398989 is a `hidden beast` number, since 242 + 398 + 9 + 8 + 9 = 666.

It is not a de Polignac number, because 242398989 - 2⁴ = 242398973 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 (242398969) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1923739 + ... + 1923864.

Almost surely, 2^242398989 is an apocalyptic number.

It is an amenable number.

242398989 is a deficient number, since it is larger than the sum of its proper divisors (157751827).

242398989 is a wasteful number, since it uses less digits than its factorization.

242398989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3847616 (or 3847613 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 54.

The square root of 242398989 is about 15569.1678968402. The cubic root of 242398989 is about 623.5102558277.

The spelling of 242398989 in words is "two hundred forty-two million, three hundred ninety-eight thousand, nine hundred eighty-nine".