1148134778 has 12 divisors (see below), whose sum is σ = 2003378202. Its totient is φ = 492057720.

The previous prime is 1148134759. The next prime is 1148134783. The reversal of 1148134778 is 8774318411.

It can be written as a sum of positive squares in only one way, i.e., 1086559369 + 61575409 = 32963^2 + 7847^2 .

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5857733 + ... + 5857928.

Almost surely, 2^1148134778 is an apocalyptic number.

1148134778 is a deficient number, since it is larger than the sum of its proper divisors (855243424).

1148134778 is a wasteful number, since it uses less digits than its factorization.

1148134778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11715677 (or 11715670 counting only the distinct ones).

The product of its digits is 150528, while the sum is 44.

The square root of 1148134778 is about 33884.1375572701. The cubic root of 1148134778 is about 1047.1228195284.

The spelling of 1148134778 in words is "one billion, one hundred forty-eight million, one hundred thirty-four thousand, seven hundred seventy-eight".