2783778000 has 80 divisors (see below), whose sum is σ = 8974919616. Its totient is φ = 742339200.

The previous prime is 2783777957. The next prime is 2783778001. The reversal of 2783778000 is 8773872.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2783778001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 225982 + ... + 237981.

Almost surely, 2^2783778000 is an apocalyptic number.

2783778000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2783778000 is an abundant number, since it is smaller than the sum of its proper divisors (6191141616).

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

2783778000 is a wasteful number, since it uses less digits than its factorization.

2783778000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463989 (or 463973 counting only the distinct ones).

The product of its (nonzero) digits is 131712, while the sum is 42.

The square root of 2783778000 is about 52761.5200690806. The cubic root of 2783778000 is about 1406.7325376140.

The spelling of 2783778000 in words is "two billion, seven hundred eighty-three million, seven hundred seventy-eight thousand".