2780001222 has 16 divisors (see below), whose sum is σ = 5563883520. Its totient is φ = 926020232.

The previous prime is 2780001199. The next prime is 2780001239. The reversal of 2780001222 is 2221000872.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2780001192 and 2780001201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152358 + ... + 169625.

It is an arithmetic number, because the mean of its divisors is an integer number (347742720).

Almost surely, 2^2780001222 is an apocalyptic number.

2780001222 is an abundant number, since it is smaller than the sum of its proper divisors (2783882298).

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

2780001222 is a wasteful number, since it uses less digits than its factorization.

2780001222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323427.

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 2780001222 is about 52725.7168941305. The cubic root of 2780001222 is about 1406.0960739057.

The spelling of 2780001222 in words is "two billion, seven hundred eighty million, one thousand, two hundred twenty-two".