12880388 has 6 divisors (see below), whose sum is σ = 22540686. Its totient is φ = 6440192.

The previous prime is 12880337. The next prime is 12880393. The reversal of 12880388 is 88308821.

It can be written as a sum of positive squares in only one way, i.e., 8952064 + 3928324 = 2992^2 + 1982^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1610045 + ... + 1610052.

It is an arithmetic number, because the mean of its divisors is an integer number (3756781).

Almost surely, 2^12880388 is an apocalyptic number.

It is an amenable number.

12880388 is a deficient number, since it is larger than the sum of its proper divisors (9660298).

12880388 is a wasteful number, since it uses less digits than its factorization.

12880388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3220101 (or 3220099 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 38.

The square root of 12880388 is about 3588.9257445648. The cubic root of 12880388 is about 234.4100973336.

Subtracting from 12880388 its sum of digits (38), we obtain a triangular number (12880350 = T₅₀₇₅).

The spelling of 12880388 in words is "twelve million, eight hundred eighty thousand, three hundred eighty-eight".