12780450 has 48 divisors (see below), whose sum is σ = 35220960. Its totient is φ = 3407760.

The previous prime is 12780409. The next prime is 12780511. The reversal of 12780450 is 5408721.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 3384 + ... + 6083.

It is an arithmetic number, because the mean of its divisors is an integer number (733770).

Almost surely, 2^12780450 is an apocalyptic number.

12780450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12780450 is an abundant number, since it is smaller than the sum of its proper divisors (22440510).

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

12780450 is a wasteful number, since it uses less digits than its factorization.

12780450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9488 (or 9477 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 12780450 is about 3574.9755243917. The cubic root of 12780450 is about 233.8022655678.

The spelling of 12780450 in words is "twelve million, seven hundred eighty thousand, four hundred fifty".