7774128238 has 16 divisors (see below), whose sum is σ = 11981887920. Its totient is φ = 3780262656.

The previous prime is 7774128233. The next prime is 7774128269. The reversal of 7774128238 is 8328214777.

It is a junction number, because it is equal to n+sod(n) for n = 7774128191 and 7774128200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7774128233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145093 + ... + 191311.

It is an arithmetic number, because the mean of its divisors is an integer number (748867995).

Almost surely, 2^7774128238 is an apocalyptic number.

7774128238 is a deficient number, since it is larger than the sum of its proper divisors (4207759682).

7774128238 is a wasteful number, since it uses less digits than its factorization.

7774128238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48531.

The product of its digits is 1053696, while the sum is 49.

The square root of 7774128238 is about 88171.0169953823. The cubic root of 7774128238 is about 1980.9973751106.

The spelling of 7774128238 in words is "seven billion, seven hundred seventy-four million, one hundred twenty-eight thousand, two hundred thirty-eight".