12780064 has 24 divisors (see below), whose sum is σ = 27448848. Its totient is φ = 5808960.

The previous prime is 12780017. The next prime is 12780113. The reversal of 12780064 is 46008721.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17802 + ... + 18505.

It is an arithmetic number, because the mean of its divisors is an integer number (1143702).

Almost surely, 2^12780064 is an apocalyptic number.

It is an amenable number.

12780064 is an abundant number, since it is smaller than the sum of its proper divisors (14668784).

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

12780064 is a wasteful number, since it uses less digits than its factorization.

12780064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36328 (or 36320 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 12780064 is about 3574.9215376005. The cubic root of 12780064 is about 233.7999117492.

Adding to 12780064 its reverse (46008721), we get a palindrome (58788785).

The spelling of 12780064 in words is "twelve million, seven hundred eighty thousand, sixty-four".