12407780 has 72 divisors (see below), whose sum is σ = 33094656. Its totient is φ = 3864000.

The previous prime is 12407767. The next prime is 12407803. The reversal of 12407780 is 8770421.

It is a congruent number.

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, 10205 + ... + 11355.

It is an arithmetic number, because the mean of its divisors is an integer number (459648).

Almost surely, 2^12407780 is an apocalyptic number.

12407780 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 12407780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16547328).

12407780 is an abundant number, since it is smaller than the sum of its proper divisors (20686876).

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

12407780 is a wasteful number, since it uses less digits than its factorization.

12407780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1185 (or 1176 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 12407780 is about 3522.4678848784. The cubic root of 12407780 is about 231.5073025979.

The spelling of 12407780 in words is "twelve million, four hundred seven thousand, seven hundred eighty".