2681620 has 12 divisors (see below), whose sum is σ = 5631444. Its totient is φ = 1072640.

The previous prime is 2681617. The next prime is 2681663. The reversal of 2681620 is 261862.

It can be written as a sum of positive squares in 2 ways, for example, as 799236 + 1882384 = 894^2 + 1372^2 .

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, 67021 + ... + 67060.

It is an arithmetic number, because the mean of its divisors is an integer number (469287).

2^2681620 is an apocalyptic number.

2681620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2681620 is an abundant number, since it is smaller than the sum of its proper divisors (2949824).

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

2681620 is a wasteful number, since it uses less digits than its factorization.

2681620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134090 (or 134088 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 2681620 is about 1637.5652658749. The cubic root of 2681620 is about 138.9309734393.

The spelling of 2681620 in words is "two million, six hundred eighty-one thousand, six hundred twenty".