2780023556 has 6 divisors (see below), whose sum is σ = 4865041230. Its totient is φ = 1390011776.

The previous prime is 2780023489. The next prime is 2780023567. The reversal of 2780023556 is 6553200872.

It can be written as a sum of positive squares in only one way, i.e., 1725073156 + 1054950400 = 41534^2 + 32480^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 347502941 + ... + 347502948.

It is an arithmetic number, because the mean of its divisors is an integer number (810840205).

Almost surely, 2^2780023556 is an apocalyptic number.

It is an amenable number.

2780023556 is a deficient number, since it is larger than the sum of its proper divisors (2085017674).

2780023556 is a wasteful number, since it uses less digits than its factorization.

2780023556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 695005893 (or 695005891 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 38.

The square root of 2780023556 is about 52725.9286878856. The cubic root of 2780023556 is about 1406.0998393315.

The spelling of 2780023556 in words is "two billion, seven hundred eighty million, twenty-three thousand, five hundred fifty-six".