12688590 has 32 divisors (see below), whose sum is σ = 31104000. Its totient is φ = 3311264.

The previous prime is 12688589. The next prime is 12688597. The reversal of 12688590 is 9588621.

12688590 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×12688590² = 322000632376200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12688597) 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, 3090 + ... + 5909.

It is an arithmetic number, because the mean of its divisors is an integer number (972000).

Almost surely, 2^12688590 is an apocalyptic number.

12688590 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12688590 is an abundant number, since it is smaller than the sum of its proper divisors (18415410).

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

12688590 is a wasteful number, since it uses less digits than its factorization.

12688590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9056.

The product of its (nonzero) digits is 34560, while the sum is 39.

The square root of 12688590 is about 3562.1047149122. The cubic root of 12688590 is about 233.2407637335.

The spelling of 12688590 in words is "twelve million, six hundred eighty-eight thousand, five hundred ninety".