1139812478 has 16 divisors (see below), whose sum is σ = 1954423680. Its totient is φ = 488376216.

The previous prime is 1139812459. The next prime is 1139812507. The reversal of 1139812478 is 8742189311.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82925 + ... + 95687.

It is an arithmetic number, because the mean of its divisors is an integer number (122151480).

Almost surely, 2^1139812478 is an apocalyptic number.

1139812478 is a deficient number, since it is larger than the sum of its proper divisors (814611202).

1139812478 is a wasteful number, since it uses less digits than its factorization.

1139812478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19151.

The product of its digits is 96768, while the sum is 44.

The square root of 1139812478 is about 33761.1089569048. The cubic root of 1139812478 is about 1044.5866448163.

The spelling of 1139812478 in words is "one billion, one hundred thirty-nine million, eight hundred twelve thousand, four hundred seventy-eight".