9012890 has 16 divisors (see below), whose sum is σ = 17177832. Its totient is φ = 3393024.

The previous prime is 9012889. The next prime is 9012893. The reversal of 9012890 is 982109.

It can be written as a sum of positive squares in 4 ways, for example, as 9006001 + 6889 = 3001^2 + 83^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9012893) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26339 + ... + 26678.

Almost surely, 2^9012890 is an apocalyptic number.

9012890 is a deficient number, since it is larger than the sum of its proper divisors (8164942).

9012890 is a wasteful number, since it uses less digits than its factorization.

9012890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53041.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 9012890 is about 3002.1475646610. The cubic root of 9012890 is about 208.1076396766.

Adding to 9012890 its reverse (982109), we get a palindrome (9994999).

The spelling of 9012890 in words is "nine million, twelve thousand, eight hundred ninety".