776223138 has 16 divisors (see below), whose sum is σ = 1571151456. Its totient is φ = 255623520.

The previous prime is 776223137. The next prime is 776223139. The reversal of 776223138 is 831322677.

It is an interprime number because it is at equal distance from previous prime (776223137) and next prime (776223139).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 776223096 and 776223105.

It is not an unprimeable number, because it can be changed into a prime (776223137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 778843 + ... + 779838.

It is an arithmetic number, because the mean of its divisors is an integer number (98196966).

Almost surely, 2^776223138 is an apocalyptic number.

776223138 is an abundant number, since it is smaller than the sum of its proper divisors (794928318).

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

776223138 is a wasteful number, since it uses less digits than its factorization.

776223138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1558769.

The product of its digits is 84672, while the sum is 39.

The square root of 776223138 is about 27860.7813601844. The cubic root of 776223138 is about 919.0282501006.

The spelling of 776223138 in words is "seven hundred seventy-six million, two hundred twenty-three thousand, one hundred thirty-eight".