12985400 has 24 divisors (see below), whose sum is σ = 30191520. Its totient is φ = 5194080.

The previous prime is 12985393. The next prime is 12985421. The reversal of 12985400 is 458921.

It is a super-2 number, since 2×12985400² = 337241226320000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 32264 + ... + 32663.

It is an arithmetic number, because the mean of its divisors is an integer number (1257980).

Almost surely, 2^12985400 is an apocalyptic number.

12985400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12985400 is an abundant number, since it is smaller than the sum of its proper divisors (17206120).

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

12985400 is a wasteful number, since it uses less digits than its factorization.

12985400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64943 (or 64934 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 12985400 is about 3603.5260509673. The cubic root of 12985400 is about 235.0454114746.

The spelling of 12985400 in words is "twelve million, nine hundred eighty-five thousand, four hundred".