9890242 has 4 divisors (see below), whose sum is σ = 14835366. Its totient is φ = 4945120.

The previous prime is 9890239. The next prime is 9890249. The reversal of 9890242 is 2420989.

9890242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 6859161 + 3031081 = 2619^2 + 1741^2 .

It is a junction number, because it is equal to n+sod(n) for n = 9890198 and 9890207.

It is not an unprimeable number, because it can be changed into a prime (9890249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2472559 + ... + 2472562.

Almost surely, 2^9890242 is an apocalyptic number.

9890242 is a deficient number, since it is larger than the sum of its proper divisors (4945124).

9890242 is a wasteful number, since it uses less digits than its factorization.

9890242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4945123.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 9890242 is about 3144.8755142295. The cubic root of 9890242 is about 214.6523460263.

The spelling of 9890242 in words is "nine million, eight hundred ninety thousand, two hundred forty-two".