1138778358 has 32 divisors (see below), whose sum is σ = 2297046912. Its totient is φ = 376358400.

The previous prime is 1138778339. The next prime is 1138778363. The reversal of 1138778358 is 8538778311.

It is a super-2 number, since 2×1138778358² = 2593632297298352328, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1138778358.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 381813 + ... + 384783.

It is an arithmetic number, because the mean of its divisors is an integer number (71782716).

Almost surely, 2^1138778358 is an apocalyptic number.

1138778358 is an abundant number, since it is smaller than the sum of its proper divisors (1158268554).

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

1138778358 is a wasteful number, since it uses less digits than its factorization.

1138778358 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3500.

The product of its digits is 1128960, while the sum is 51.

The square root of 1138778358 is about 33745.7902263379. The cubic root of 1138778358 is about 1044.2706411422.

The spelling of 1138778358 in words is "one billion, one hundred thirty-eight million, seven hundred seventy-eight thousand, three hundred fifty-eight".