2680381 has 4 divisors (see below), whose sum is σ = 2924064. Its totient is φ = 2436700.

The previous prime is 2680367. The next prime is 2680393. The reversal of 2680381 is 1830862.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2680381 - 2⁹ = 2679869 is a prime.

It is a super-2 number, since 2×2680381² = 14368884610322, which contains 22 as substring.

2680381 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2680481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121825 + ... + 121846.

It is an arithmetic number, because the mean of its divisors is an integer number (731016).

2^2680381 is an apocalyptic number.

It is an amenable number.

2680381 is a deficient number, since it is larger than the sum of its proper divisors (243683).

2680381 is a wasteful number, since it uses less digits than its factorization.

2680381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243682.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 2680381 is about 1637.1869166348. The cubic root of 2680381 is about 138.9095731920.

The spelling of 2680381 in words is "two million, six hundred eighty thousand, three hundred eighty-one".