1949778846 has 12 divisors (see below), whose sum is σ = 4224520872. Its totient is φ = 649926276.

The previous prime is 1949778791. The next prime is 1949778847. The reversal of 1949778846 is 6488779491.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1949778847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 54160506 + ... + 54160541.

It is an arithmetic number, because the mean of its divisors is an integer number (352043406).

Almost surely, 2^1949778846 is an apocalyptic number.

1949778846 is an abundant number, since it is smaller than the sum of its proper divisors (2274742026).

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

1949778846 is a wasteful number, since it uses less digits than its factorization.

1949778846 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108321055 (or 108321052 counting only the distinct ones).

The product of its digits is 24385536, while the sum is 63.

The square root of 1949778846 is about 44156.3001846849. The cubic root of 1949778846 is about 1249.2857457638.

The spelling of 1949778846 in words is "one billion, nine hundred forty-nine million, seven hundred seventy-eight thousand, eight hundred forty-six".