7730274138 has 8 divisors (see below), whose sum is σ = 15460548288. Its totient is φ = 2576758044.

The previous prime is 7730274107. The next prime is 7730274151. The reversal of 7730274138 is 8314720377.

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

7730274138 is an admirable number.

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 7730274138.

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, 644189506 + ... + 644189517.

It is an arithmetic number, because the mean of its divisors is an integer number (1932568536).

Almost surely, 2^7730274138 is an apocalyptic number.

7730274138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

7730274138 is a wasteful number, since it uses less digits than its factorization.

7730274138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1288379028.

The product of its (nonzero) digits is 197568, while the sum is 42.

The square root of 7730274138 is about 87921.9775596523. The cubic root of 7730274138 is about 1977.2653928747.

The spelling of 7730274138 in words is "seven billion, seven hundred thirty million, two hundred seventy-four thousand, one hundred thirty-eight".