1139451378 has 16 divisors (see below), whose sum is σ = 2454203136. Its totient is φ = 350600400.

The previous prime is 1139451361. The next prime is 1139451389. The reversal of 1139451378 is 8731549311.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7304098 + ... + 7304253.

It is an arithmetic number, because the mean of its divisors is an integer number (153387696).

Almost surely, 2^1139451378 is an apocalyptic number.

1139451378 is an abundant number, since it is smaller than the sum of its proper divisors (1314751758).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1139451378 is a wasteful number, since it uses less digits than its factorization.

1139451378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14608369.

The product of its digits is 90720, while the sum is 42.

The square root of 1139451378 is about 33755.7606639222. The cubic root of 1139451378 is about 1044.4763225528.

The spelling of 1139451378 in words is "one billion, one hundred thirty-nine million, four hundred fifty-one thousand, three hundred seventy-eight".