12489690 has 48 divisors (see below), whose sum is σ = 31375008. Its totient is φ = 3181728.

The previous prime is 12489661. The next prime is 12489703. The reversal of 12489690 is 9698421.

It is a super-2 number, since 2×12489690² = 311984712592200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15477 + ... + 16263.

It is an arithmetic number, because the mean of its divisors is an integer number (653646).

Almost surely, 2^12489690 is an apocalyptic number.

12489690 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 12489690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15687504).

12489690 is an abundant number, since it is smaller than the sum of its proper divisors (18885318).

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

12489690 is a wasteful number, since it uses less digits than its factorization.

12489690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 843 (or 820 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 12489690 is about 3534.0755509751. The cubic root of 12489690 is about 232.0156177556.

The spelling of 12489690 in words is "twelve million, four hundred eighty-nine thousand, six hundred ninety".