2783457985 has 36 divisors (see below), whose sum is σ = 4270862484. Its totient is φ = 1735124160.

The previous prime is 2783457967. The next prime is 2783458021. The reversal of 2783457985 is 5897543872.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 474847681 + 2308610304 = 21791^2 + 48048^2 .

It is not a de Polignac number, because 2783457985 - 2⁹ = 2783457473 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 17302 + ... + 76591.

It is an arithmetic number, because the mean of its divisors is an integer number (118635069).

Almost surely, 2^2783457985 is an apocalyptic number.

It is an amenable number.

2783457985 is a deficient number, since it is larger than the sum of its proper divisors (1487404499).

2783457985 is a wasteful number, since it uses less digits than its factorization.

2783457985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93934 (or 93916 counting only the distinct ones).

The product of its digits is 16934400, while the sum is 58.

The square root of 2783457985 is about 52758.4873266852. The cubic root of 2783457985 is about 1406.6786309250.

The spelling of 2783457985 in words is "two billion, seven hundred eighty-three million, four hundred fifty-seven thousand, nine hundred eighty-five".