1138408 has 24 divisors (see below), whose sum is σ = 2239650. Its totient is φ = 542432.

The previous prime is 1138393. The next prime is 1138409. The reversal of 1138408 is 8048311.

It can be written as a sum of positive squares in only one way, i.e., 1119364 + 19044 = 1058^2 + 138^2 .

It is not an unprimeable number, because it can be changed into a prime (1138409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4098 + ... + 4366.

2^1138408 is an apocalyptic number.

It is an amenable number.

1138408 is a deficient number, since it is larger than the sum of its proper divisors (1101242).

1138408 is a wasteful number, since it uses less digits than its factorization.

1138408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321 (or 294 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 1138408 is about 1066.9620424364. The cubic root of 1138408 is about 104.4157421592.

Subtracting 1138408 from its reverse (8048311), we obtain a triangular number (6909903 = T₃₇₁₇).

The spelling of 1138408 in words is "one million, one hundred thirty-eight thousand, four hundred eight".