12279400 has 96 divisors (see below), whose sum is σ = 33480000. Its totient is φ = 4186560.

The previous prime is 12279391. The next prime is 12279431. The reversal of 12279400 is 497221.

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

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, 68511 + ... + 68689.

It is an arithmetic number, because the mean of its divisors is an integer number (348750).

Almost surely, 2^12279400 is an apocalyptic number.

12279400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12279400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16740000).

12279400 is an abundant number, since it is smaller than the sum of its proper divisors (21200600).

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

12279400 is a wasteful number, since it uses less digits than its factorization.

12279400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216 (or 193 counting only the distinct ones).

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

The square root of 12279400 is about 3504.1974830195. The cubic root of 12279400 is about 230.7060847170.

The spelling of 12279400 in words is "twelve million, two hundred seventy-nine thousand, four hundred".