12985890 has 32 divisors (see below), whose sum is σ = 32011200. Its totient is φ = 3369024.

The previous prime is 12985867. The next prime is 12985891. The reversal of 12985890 is 9858921.

It is a happy number.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (12985891) 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, 4740 + ... + 6959.

It is an arithmetic number, because the mean of its divisors is an integer number (1000350).

Almost surely, 2^12985890 is an apocalyptic number.

12985890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12985890 is an abundant number, since it is smaller than the sum of its proper divisors (19025310).

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

12985890 is a wasteful number, since it uses less digits than its factorization.

12985890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11746.

The product of its (nonzero) digits is 51840, while the sum is 42.

The square root of 12985890 is about 3603.5940392891. The cubic root of 12985890 is about 235.0483678924.

The spelling of 12985890 in words is "twelve million, nine hundred eighty-five thousand, eight hundred ninety".