1244396158 has 32 divisors (see below), whose sum is σ = 2030966784. Its totient is φ = 569584512.

The previous prime is 1244396137. The next prime is 1244396161. The reversal of 1244396158 is 8516934421.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 264535 + ... + 269197.

It is an arithmetic number, because the mean of its divisors is an integer number (63467712).

Almost surely, 2^1244396158 is an apocalyptic number.

1244396158 is a deficient number, since it is larger than the sum of its proper divisors (786570626).

1244396158 is a wasteful number, since it uses less digits than its factorization.

1244396158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4896.

The product of its digits is 207360, while the sum is 43.

The square root of 1244396158 is about 35275.9997448690. Note that the first 3 decimals coincide. The cubic root of 1244396158 is about 1075.6051852532.

The spelling of 1244396158 in words is "one billion, two hundred forty-four million, three hundred ninety-six thousand, one hundred fifty-eight".