2688493 has 8 divisors (see below), whose sum is σ = 2874816. Its totient is φ = 2508000.

The previous prime is 2688487. The next prime is 2688523. The reversal of 2688493 is 3948862.

2688493 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2688493 - 2²¹ = 591341 is a prime.

It is a super-2 number, since 2×2688493² = 14455989222098, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2688473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 483 + ... + 2368.

It is an arithmetic number, because the mean of its divisors is an integer number (359352).

2^2688493 is an apocalyptic number.

2688493 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

2688493 is a deficient number, since it is larger than the sum of its proper divisors (186323).

2688493 is a wasteful number, since it uses less digits than its factorization.

2688493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2915.

The product of its digits is 82944, while the sum is 40.

The square root of 2688493 is about 1639.6624652653. The cubic root of 2688493 is about 139.0495656783.

The spelling of 2688493 in words is "two million, six hundred eighty-eight thousand, four hundred ninety-three".