2788681 has 8 divisors (see below), whose sum is σ = 3325824. Its totient is φ = 2286240.

The previous prime is 2788661. The next prime is 2788693. The reversal of 2788681 is 1868872.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2788681 - 2¹¹ = 2786633 is a prime.

It is a super-2 number, since 2×2788681² = 15553483439522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2788661) 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, 8500 + ... + 8821.

It is an arithmetic number, because the mean of its divisors is an integer number (415728).

2^2788681 is an apocalyptic number.

It is an amenable number.

2788681 is a deficient number, since it is larger than the sum of its proper divisors (537143).

2788681 is a wasteful number, since it uses less digits than its factorization.

2788681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17351.

The product of its digits is 43008, while the sum is 40.

The square root of 2788681 is about 1669.9344298505. The cubic root of 2788681 is about 140.7557934406.

The spelling of 2788681 in words is "two million, seven hundred eighty-eight thousand, six hundred eighty-one".