1139978458 has 8 divisors (see below), whose sum is σ = 1768932180. Its totient is φ = 550334400.

The previous prime is 1139978449. The next prime is 1139978491. The reversal of 1139978458 is 8548799311.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1125132849 + 14845609 = 33543^2 + 3853^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1139978399 and 1139978408.

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, 9827343 + ... + 9827458.

Almost surely, 2^1139978458 is an apocalyptic number.

1139978458 is a deficient number, since it is larger than the sum of its proper divisors (628953722).

1139978458 is a wasteful number, since it uses less digits than its factorization.

1139978458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19654832.

The product of its digits is 2177280, while the sum is 55.

The square root of 1139978458 is about 33763.5670212731. The cubic root of 1139978458 is about 1044.6373467459.

The spelling of 1139978458 in words is "one billion, one hundred thirty-nine million, nine hundred seventy-eight thousand, four hundred fifty-eight".