2788128630 has 96 divisors (see below), whose sum is σ = 8365353984. Its totient is φ = 631084608.

The previous prime is 2788128619. The next prime is 2788128641. The reversal of 2788128630 is 368218872.

2788128630 is a `hidden beast` number, since 2 + 7 + 8 + 8 + 1 + 2 + 8 + 630 = 666.

It is an interprime number because it is at equal distance from previous prime (2788128619) and next prime (2788128641).

It is a super-2 number, since 2×2788128630² = 15547322514851353800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 43407 + ... + 86373.

It is an arithmetic number, because the mean of its divisors is an integer number (87139104).

Almost surely, 2^2788128630 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2788128630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4182676992).

2788128630 is an abundant number, since it is smaller than the sum of its proper divisors (5577225354).

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

2788128630 is a wasteful number, since it uses less digits than its factorization.

2788128630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43090 (or 43087 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 45.

The square root of 2788128630 is about 52802.7331678958. The cubic root of 2788128630 is about 1407.4649939186.

The spelling of 2788128630 in words is "two billion, seven hundred eighty-eight million, one hundred twenty-eight thousand, six hundred thirty".