12256780 has 48 divisors (see below), whose sum is σ = 27143424. Its totient is φ = 4642560.

The previous prime is 12256759. The next prime is 12256787. The reversal of 12256780 is 8765221.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is not an unprimeable number, because it can be changed into a prime (12256787) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32674 + ... + 33046.

It is an arithmetic number, because the mean of its divisors is an integer number (565488).

Almost surely, 2^12256780 is an apocalyptic number.

12256780 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 12256780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13571712).

12256780 is an abundant number, since it is smaller than the sum of its proper divisors (14886644).

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

12256780 is a wasteful number, since it uses less digits than its factorization.

12256780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466 (or 464 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 12256780 is about 3500.9684374470. The cubic root of 12256780 is about 230.5643356817.

The spelling of 12256780 in words is "twelve million, two hundred fifty-six thousand, seven hundred eighty".