2620781884 has 12 divisors (see below), whose sum is σ = 5241563824. Its totient is φ = 1123192224.

The previous prime is 2620781873. The next prime is 2620781893. The reversal of 2620781884 is 4881870262.

It is a happy number.

2620781884 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46799649 + ... + 46799704.

Almost surely, 2^2620781884 is an apocalyptic number.

It is an amenable number.

2620781884 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2620781884 is a wasteful number, since it uses less digits than its factorization.

2620781884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93599364 (or 93599362 counting only the distinct ones).

The product of its (nonzero) digits is 344064, while the sum is 46.

The square root of 2620781884 is about 51193.5726825155. The cubic root of 2620781884 is about 1378.7228055747.

The spelling of 2620781884 in words is "two billion, six hundred twenty million, seven hundred eighty-one thousand, eight hundred eighty-four".