12477440 has 44 divisors (see below), whose sum is σ = 29943516. Its totient is φ = 4988928.

The previous prime is 12477403. The next prime is 12477449. The reversal of 12477440 is 4477421.

It can be written as a sum of positive squares in 2 ways, for example, as 8667136 + 3810304 = 2944^2 + 1952^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12477449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3902 + ... + 6338.

Almost surely, 2^12477440 is an apocalyptic number.

12477440 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 12477440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14971758).

12477440 is an abundant number, since it is smaller than the sum of its proper divisors (17466076).

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

12477440 is an equidigital number, since it uses as much as digits as its factorization.

12477440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2462 (or 2444 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 29.

The square root of 12477440 is about 3532.3419992974. The cubic root of 12477440 is about 231.9397386094.

The spelling of 12477440 in words is "twelve million, four hundred seventy-seven thousand, four hundred forty".