1438136849 has 8 divisors (see below), whose sum is σ = 1488120480. Its totient is φ = 1388905056.

The previous prime is 1438136837. The next prime is 1438136873. The reversal of 1438136849 is 9486318341.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1438136849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1438136899) 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, 184067 + ... + 191720.

It is an arithmetic number, because the mean of its divisors is an integer number (186015060).

Almost surely, 2^1438136849 is an apocalyptic number.

It is an amenable number.

1438136849 is a deficient number, since it is larger than the sum of its proper divisors (49983631).

1438136849 is an equidigital number, since it uses as much as digits as its factorization.

1438136849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375919.

The product of its digits is 497664, while the sum is 47.

The square root of 1438136849 is about 37922.7748061768. The cubic root of 1438136849 is about 1128.7559988431.

The spelling of 1438136849 in words is "one billion, four hundred thirty-eight million, one hundred thirty-six thousand, eight hundred forty-nine".