1936920778 has 16 divisors (see below), whose sum is σ = 3129970536. Its totient is φ = 893649600.

The previous prime is 1936920763. The next prime is 1936920779. The reversal of 1936920778 is 8770296391.

It can be written as a sum of positive squares in 4 ways, for example, as 1919053249 + 17867529 = 43807^2 + 4227^2 .

It is not an unprimeable number, because it can be changed into a prime (1936920779) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73128 + ... + 96028.

Almost surely, 2^1936920778 is an apocalyptic number.

1936920778 is a deficient number, since it is larger than the sum of its proper divisors (1193049758).

1936920778 is a wasteful number, since it uses less digits than its factorization.

1936920778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26169.

The product of its (nonzero) digits is 1143072, while the sum is 52.

The square root of 1936920778 is about 44010.4621425406. The cubic root of 1936920778 is about 1246.5334948670.

The spelling of 1936920778 in words is "one billion, nine hundred thirty-six million, nine hundred twenty thousand, seven hundred seventy-eight".