2687081620 has 24 divisors (see below), whose sum is σ = 5722351488. Its totient is φ = 1059693600.

The previous prime is 2687081491. The next prime is 2687081627. The reversal of 2687081620 is 261807862.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2687081627) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 944736 + ... + 947575.

It is an arithmetic number, because the mean of its divisors is an integer number (238431312).

Almost surely, 2^2687081620 is an apocalyptic number.

2687081620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2687081620 is an abundant number, since it is smaller than the sum of its proper divisors (3035269868).

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

2687081620 is a wasteful number, since it uses less digits than its factorization.

2687081620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1892391 (or 1892389 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 2687081620 is about 51837.0680112215. The cubic root of 2687081620 is about 1390.2522910409.

The spelling of 2687081620 in words is "two billion, six hundred eighty-seven million, eighty-one thousand, six hundred twenty".