1138408328 has 36 divisors (see below), whose sum is σ = 2176288695. Its totient is φ = 558277200.

The previous prime is 1138408321. The next prime is 1138408333. The reversal of 1138408328 is 8238048311.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 569204164 + 569204164 = 23858^2 + 23858^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=23858.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1138408291 and 1138408300.

It is not an unprimeable number, because it can be changed into a prime (1138408321) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 7539053 + ... + 7539203.

Almost surely, 2^1138408328 is an apocalyptic number.

It is an amenable number.

1138408328 is a deficient number, since it is larger than the sum of its proper divisors (1037880367).

1138408328 is an frugal number, since it uses more digits than its factorization.

1138408328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466 (or 232 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 38.

The square root of 1138408328 is about 33740.3071710973. The cubic root of 1138408328 is about 1044.1575218733.

The spelling of 1138408328 in words is "one billion, one hundred thirty-eight million, four hundred eight thousand, three hundred twenty-eight".