7778011228 has 48 divisors (see below), whose sum is σ = 15927869440. Its totient is φ = 3291192000.

The previous prime is 7778011201. The next prime is 7778011243. The reversal of 7778011228 is 8221108777.

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 15 ways as a sum of consecutive naturals, for example, 96348 + ... + 157603.

Almost surely, 2^7778011228 is an apocalyptic number.

It is an amenable number.

7778011228 is an abundant number, since it is smaller than the sum of its proper divisors (8149858212).

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

7778011228 is a wasteful number, since it uses less digits than its factorization.

7778011228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254018 (or 254016 counting only the distinct ones).

The product of its (nonzero) digits is 87808, while the sum is 43.

The square root of 7778011228 is about 88193.0338972416. The cubic root of 7778011228 is about 1981.3271403880.

The spelling of 7778011228 in words is "seven billion, seven hundred seventy-eight million, eleven thousand, two hundred twenty-eight".