1338851949 has 16 divisors (see below), whose sum is σ = 1898069760. Its totient is φ = 836541440.

The previous prime is 1338851939. The next prime is 1338851953. The reversal of 1338851949 is 9491588331.

It is not a de Polignac number, because 1338851949 - 2⁴ = 1338851933 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1338851939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42732 + ... + 67109.

It is an arithmetic number, because the mean of its divisors is an integer number (118629360).

Almost surely, 2^1338851949 is an apocalyptic number.

It is an amenable number.

1338851949 is a deficient number, since it is larger than the sum of its proper divisors (559217811).

1338851949 is a wasteful number, since it uses less digits than its factorization.

1338851949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110100.

The product of its digits is 933120, while the sum is 51.

The square root of 1338851949 is about 36590.3258936020. The cubic root of 1338851949 is about 1102.1588317105.

The spelling of 1338851949 in words is "one billion, three hundred thirty-eight million, eight hundred fifty-one thousand, nine hundred forty-nine".