2620728687 has 16 divisors (see below), whose sum is σ = 3708467712. Its totient is φ = 1640549760.

The previous prime is 2620728661. The next prime is 2620728731. The reversal of 2620728687 is 7868270262.

It is a happy number.

It is not a de Polignac number, because 2620728687 - 2⁷ = 2620728559 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2620728287) 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 15 ways as a sum of consecutive naturals, for example, 37633 + ... + 81594.

It is an arithmetic number, because the mean of its divisors is an integer number (231779232).

Almost surely, 2^2620728687 is an apocalyptic number.

2620728687 is a deficient number, since it is larger than the sum of its proper divisors (1087739025).

2620728687 is a wasteful number, since it uses less digits than its factorization.

2620728687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119678.

The product of its (nonzero) digits is 903168, while the sum is 48.

The square root of 2620728687 is about 51193.0531127027. The cubic root of 2620728687 is about 1378.7134770083.

The spelling of 2620728687 in words is "two billion, six hundred twenty million, seven hundred twenty-eight thousand, six hundred eighty-seven".