1138041428 has 12 divisors (see below), whose sum is σ = 2040147732. Its totient is φ = 555142080.

The previous prime is 1138041413. The next prime is 1138041439. The reversal of 1138041428 is 8241408311.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 153462544 + 984578884 = 12388^2 + 31378^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1138041394 and 1138041403.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3469475 + ... + 3469802.

It is an arithmetic number, because the mean of its divisors is an integer number (170012311).

Almost surely, 2^1138041428 is an apocalyptic number.

It is an amenable number.

1138041428 is a deficient number, since it is larger than the sum of its proper divisors (902106304).

1138041428 is a wasteful number, since it uses less digits than its factorization.

1138041428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6939322 (or 6939320 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 1138041428 is about 33734.8696158737. The cubic root of 1138041428 is about 1044.0453352499.

Adding to 1138041428 its reverse (8241408311), we get a palindrome (9379449739).

The spelling of 1138041428 in words is "one billion, one hundred thirty-eight million, forty-one thousand, four hundred twenty-eight".