1138578328 has 16 divisors (see below), whose sum is σ = 2146631760. Its totient is φ = 566143200.

The previous prime is 1138578317. The next prime is 1138578341. The reversal of 1138578328 is 8238758311.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 391708 + ... + 394603.

It is an arithmetic number, because the mean of its divisors is an integer number (134164485).

Almost surely, 2^1138578328 is an apocalyptic number.

It is an amenable number.

1138578328 is a deficient number, since it is larger than the sum of its proper divisors (1008053432).

1138578328 is a wasteful number, since it uses less digits than its factorization.

1138578328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 786498 (or 786494 counting only the distinct ones).

The product of its digits is 322560, while the sum is 46.

The square root of 1138578328 is about 33742.8263190860. The cubic root of 1138578328 is about 1044.2094944210.

The spelling of 1138578328 in words is "one billion, one hundred thirty-eight million, five hundred seventy-eight thousand, three hundred twenty-eight".