10688491 has 16 divisors (see below), whose sum is σ = 12337920. Its totient is φ = 9164320.

The previous prime is 10688479. The next prime is 10688497. The reversal of 10688491 is 19488601.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-10688491 is a prime.

It is a super-2 number, since 2×10688491² = 228487679714162, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10688491.

It is not an unprimeable number, because it can be changed into a prime (10688497) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20745 + ... + 21253.

It is an arithmetic number, because the mean of its divisors is an integer number (771120).

Almost surely, 2^10688491 is an apocalyptic number.

10688491 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

10688491 is a deficient number, since it is larger than the sum of its proper divisors (1649429).

10688491 is a wasteful number, since it uses less digits than its factorization.

10688491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626.

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 10688491 is about 3269.3257714703. The cubic root of 10688491 is about 220.2785109043.

It can be divided in two parts, 1068 and 8491, that added together give a palindrome (9559).

The spelling of 10688491 in words is "ten million, six hundred eighty-eight thousand, four hundred ninety-one".