2784400085 has 16 divisors (see below), whose sum is σ = 3417831936. Its totient is φ = 2176637568.

The previous prime is 2784400061. The next prime is 2784400093. The reversal of 2784400085 is 5800044872.

It is a cyclic number.

It is not a de Polignac number, because 2784400085 - 2¹² = 2784395989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 142889 + ... + 161201.

It is an arithmetic number, because the mean of its divisors is an integer number (213614496).

Almost surely, 2^2784400085 is an apocalyptic number.

It is an amenable number.

2784400085 is a deficient number, since it is larger than the sum of its proper divisors (633431851).

2784400085 is a wasteful number, since it uses less digits than its factorization.

2784400085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19012.

The product of its (nonzero) digits is 71680, while the sum is 38.

The square root of 2784400085 is about 52767.4149925880. The cubic root of 2784400085 is about 1406.8373163275.

The spelling of 2784400085 in words is "two billion, seven hundred eighty-four million, four hundred thousand, eighty-five".