2780212388 has 6 divisors (see below), whose sum is σ = 4865371686. Its totient is φ = 1390106192.

The previous prime is 2780212381. The next prime is 2780212399. The reversal of 2780212388 is 8832120872.

It is a happy number.

2780212388 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 1483636324 + 1296576064 = 38518^2 + 36008^2 .

It is not an unprimeable number, because it can be changed into a prime (2780212381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 347526545 + ... + 347526552.

It is an arithmetic number, because the mean of its divisors is an integer number (810895281).

Almost surely, 2^2780212388 is an apocalyptic number.

It is an amenable number.

2780212388 is a deficient number, since it is larger than the sum of its proper divisors (2085159298).

2780212388 is a wasteful number, since it uses less digits than its factorization.

2780212388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 695053101 (or 695053099 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 41.

The square root of 2780212388 is about 52727.7193514000. The cubic root of 2780212388 is about 1406.1316748691.

The spelling of 2780212388 in words is "two billion, seven hundred eighty million, two hundred twelve thousand, three hundred eighty-eight".