2122778262 has 48 divisors (see below), whose sum is σ = 4674141360. Its totient is φ = 642227520.

The previous prime is 2122778257. The next prime is 2122778263. The reversal of 2122778262 is 2628772212.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 2122778262.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2122778263) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 530164 + ... + 534152.

It is an arithmetic number, because the mean of its divisors is an integer number (97377945).

Almost surely, 2^2122778262 is an apocalyptic number.

2122778262 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 2122778262, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2337070680).

2122778262 is an abundant number, since it is smaller than the sum of its proper divisors (2551363098).

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

2122778262 is a wasteful number, since it uses less digits than its factorization.

2122778262 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4749 (or 4738 counting only the distinct ones).

The product of its digits is 75264, while the sum is 39.

The square root of 2122778262 is about 46073.6178523024. The cubic root of 2122778262 is about 1285.1925830858.

The spelling of 2122778262 in words is "two billion, one hundred twenty-two million, seven hundred seventy-eight thousand, two hundred sixty-two".