12656490 has 64 divisors (see below), whose sum is σ = 37877760. Its totient is φ = 2629440.

The previous prime is 12656477. The next prime is 12656519. The reversal of 12656490 is 9465621.

12656490 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 430 + ... + 5049.

It is an arithmetic number, because the mean of its divisors is an integer number (591840).

Almost surely, 2^12656490 is an apocalyptic number.

12656490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12656490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18938880).

12656490 is an abundant number, since it is smaller than the sum of its proper divisors (25221270).

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

12656490 is a wasteful number, since it uses less digits than its factorization.

12656490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5507.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 12656490 is about 3557.5960984912. The cubic root of 12656490 is about 233.0439109956.

It can be divided in two parts, 126 and 56490, that added together give a triangular number (56616 = T₃₃₆).

The spelling of 12656490 in words is "twelve million, six hundred fifty-six thousand, four hundred ninety".