12442890 has 16 divisors (see below), whose sum is σ = 29863008. Its totient is φ = 3318096.

The previous prime is 12442883. The next prime is 12442901. The reversal of 12442890 is 9824421.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 414763 = 12442890 / (1 + 2 + 4 + 4 + 2 + 8 + 9 + 0).

It is a Curzon 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, 207352 + ... + 207411.

It is an arithmetic number, because the mean of its divisors is an integer number (1866438).

Almost surely, 2^12442890 is an apocalyptic number.

12442890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12442890 is an abundant number, since it is smaller than the sum of its proper divisors (17420118).

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

12442890 is a wasteful number, since it uses less digits than its factorization.

12442890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414773.

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 12442890 is about 3527.4480860815. The cubic root of 12442890 is about 231.7254605246.

The spelling of 12442890 in words is "twelve million, four hundred forty-two thousand, eight hundred ninety".