2078705587 has 36 divisors (see below), whose sum is σ = 2542323576. Its totient is φ = 1694286720.

The previous prime is 2078705483. The next prime is 2078705599. The reversal of 2078705587 is 7855078702.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-2078705587 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2078705587.

It is not an unprimeable number, because it can be changed into a prime (2078705687) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3007912 + ... + 3008602.

Almost surely, 2^2078705587 is an apocalyptic number.

2078705587 is a deficient number, since it is larger than the sum of its proper divisors (463617989).

2078705587 is an equidigital number, since it uses as much as digits as its factorization.

2078705587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 836 (or 800 counting only the distinct ones).

The product of its (nonzero) digits is 1097600, while the sum is 49.

The square root of 2078705587 is about 45592.8238541988. The cubic root of 2078705587 is about 1276.2360100637.

The spelling of 2078705587 in words is "two billion, seventy-eight million, seven hundred five thousand, five hundred eighty-seven".