1148981378 has 4 divisors (see below), whose sum is σ = 1723472070. Its totient is φ = 574490688.

The previous prime is 1148981369. The next prime is 1148981419. The reversal of 1148981378 is 8731898411.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1054755529 + 94225849 = 32477^2 + 9707^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 287245343 + ... + 287245346.

Almost surely, 2^1148981378 is an apocalyptic number.

1148981378 is a deficient number, since it is larger than the sum of its proper divisors (574490692).

1148981378 is an equidigital number, since it uses as much as digits as its factorization.

1148981378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 574490691.

The product of its digits is 387072, while the sum is 50.

The square root of 1148981378 is about 33896.6278263782. The cubic root of 1148981378 is about 1047.3801285697.

The spelling of 1148981378 in words is "one billion, one hundred forty-eight million, nine hundred eighty-one thousand, three hundred seventy-eight".