12290538 has 16 divisors (see below), whose sum is σ = 26472096. Its totient is φ = 3781680.

The previous prime is 12290521. The next prime is 12290567. The reversal of 12290538 is 83509221.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78708 + ... + 78863.

It is an arithmetic number, because the mean of its divisors is an integer number (1654506).

Almost surely, 2^12290538 is an apocalyptic number.

12290538 is an abundant number, since it is smaller than the sum of its proper divisors (14181558).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12290538 is a wasteful number, since it uses less digits than its factorization.

12290538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157589.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 12290538 is about 3505.7863597202. The cubic root of 12290538 is about 230.7758174359.

Adding to 12290538 its reverse (83509221), we get a palindrome (95799759).

The spelling of 12290538 in words is "twelve million, two hundred ninety thousand, five hundred thirty-eight".