2783818856 has 32 divisors (see below), whose sum is σ = 6424199040. Its totient is φ = 1101290688.

The previous prime is 2783818841. The next prime is 2783818859. The reversal of 2783818856 is 6588183872.

It is a super-2 number, since 2×2783818856² = 15499294846042297472, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is not an unprimeable number, because it can be changed into a prime (2783818859) 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 7 ways as a sum of consecutive naturals, for example, 1911236 + ... + 1912691.

It is an arithmetic number, because the mean of its divisors is an integer number (200756220).

Almost surely, 2^2783818856 is an apocalyptic number.

2783818856 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

2783818856 is an abundant number, since it is smaller than the sum of its proper divisors (3640380184).

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

2783818856 is a wasteful number, since it uses less digits than its factorization.

2783818856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3823953 (or 3823949 counting only the distinct ones).

The product of its digits is 5160960, while the sum is 56.

The square root of 2783818856 is about 52761.9072437682. The cubic root of 2783818856 is about 1406.7394195305.

The spelling of 2783818856 in words is "two billion, seven hundred eighty-three million, eight hundred eighteen thousand, eight hundred fifty-six".