2805005987 has 16 divisors (see below), whose sum is σ = 3256231680. Its totient is φ = 2366467488.

The previous prime is 2805005977. The next prime is 2805006007. The reversal of 2805005987 is 7895005082.

It is not a de Polignac number, because 2805005987 - 2⁶ = 2805005923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2805005977) 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, 1095713 + ... + 1098269.

It is an arithmetic number, because the mean of its divisors is an integer number (203514480).

Almost surely, 2^2805005987 is an apocalyptic number.

2805005987 is a deficient number, since it is larger than the sum of its proper divisors (451225693).

2805005987 is a wasteful number, since it uses less digits than its factorization.

2805005987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4970.

The product of its (nonzero) digits is 201600, while the sum is 44.

The square root of 2805005987 is about 52962.3072288208. The cubic root of 2805005987 is about 1410.2992150400.

The spelling of 2805005987 in words is "two billion, eight hundred five million, five thousand, nine hundred eighty-seven".