1438891299 has 24 divisors (see below), whose sum is σ = 2189445440. Its totient is φ = 908085168.

The previous prime is 1438891297. The next prime is 1438891309. The reversal of 1438891299 is 9921988341.

1438891299 is a `hidden beast` number, since 1 + 438 + 89 + 129 + 9 = 666.

It is not a de Polignac number, because 1438891299 - 2¹ = 1438891297 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1438891297) 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 23 ways as a sum of consecutive naturals, for example, 317004 + ... + 321510.

Almost surely, 2^1438891299 is an apocalyptic number.

1438891299 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1438891299 is a deficient number, since it is larger than the sum of its proper divisors (750554141).

1438891299 is a wasteful number, since it uses less digits than its factorization.

1438891299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6399 (or 6396 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 54.

The square root of 1438891299 is about 37932.7206907177. The cubic root of 1438891299 is about 1128.9533470282.

The spelling of 1438891299 in words is "one billion, four hundred thirty-eight million, eight hundred ninety-one thousand, two hundred ninety-nine".