12729400 has 24 divisors (see below), whose sum is σ = 29596320. Its totient is φ = 5091680.

The previous prime is 12729391. The next prime is 12729439. The reversal of 12729400 is 492721.

It is a Harshad number since it is a multiple of its sum of digits (25).

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, 31624 + ... + 32023.

It is an arithmetic number, because the mean of its divisors is an integer number (1233180).

Almost surely, 2^12729400 is an apocalyptic number.

12729400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12729400 is an abundant number, since it is smaller than the sum of its proper divisors (16866920).

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

12729400 is a wasteful number, since it uses less digits than its factorization.

12729400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63663 (or 63654 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 12729400 is about 3567.8284712133. The cubic root of 12729400 is about 233.4905516400.

The spelling of 12729400 in words is "twelve million, seven hundred twenty-nine thousand, four hundred".