1776268138 has 12 divisors (see below), whose sum is σ = 2673020610. Its totient is φ = 885264680.

The previous prime is 1776268111. The next prime is 1776268189. The reversal of 1776268138 is 8318626771.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1664395209 + 111872929 = 40797^2 + 10577^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1776268091 and 1776268100.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1174803 + ... + 1176313.

Almost surely, 2^1776268138 is an apocalyptic number.

1776268138 is a deficient number, since it is larger than the sum of its proper divisors (896752472).

1776268138 is an frugal number, since it uses more digits than its factorization.

1776268138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3413 (or 1902 counting only the distinct ones).

The product of its digits is 677376, while the sum is 49.

The square root of 1776268138 is about 42145.7962079256. The cubic root of 1776268138 is about 1211.0707317576.

The spelling of 1776268138 in words is "one billion, seven hundred seventy-six million, two hundred sixty-eight thousand, one hundred thirty-eight".