7778220352 has 28 divisors (see below), whose sum is σ = 17639893600. Its totient is φ = 3333522816.

The previous prime is 7778220277. The next prime is 7778220367. The reversal of 7778220352 is 2530228777.

It is a tau number, because it is divible by the number of its divisors (28).

It is a junction number, because it is equal to n+sod(n) for n = 7778220299 and 7778220308.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8680602 + ... + 8681497.

It is an arithmetic number, because the mean of its divisors is an integer number (629996200).

Almost surely, 2^7778220352 is an apocalyptic number.

It is an amenable number.

7778220352 is an abundant number, since it is smaller than the sum of its proper divisors (9861673248).

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

7778220352 is a wasteful number, since it uses less digits than its factorization.

7778220352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17362118 (or 17362108 counting only the distinct ones).

The product of its (nonzero) digits is 329280, while the sum is 43.

The square root of 7778220352 is about 88194.2194931164. The cubic root of 7778220352 is about 1981.3448972554.

The spelling of 7778220352 in words is "seven billion, seven hundred seventy-eight million, two hundred twenty thousand, three hundred fifty-two".