12988278 has 12 divisors (see below), whose sum is σ = 28141308. Its totient is φ = 4329420.

The previous prime is 12988277. The next prime is 12988291. The reversal of 12988278 is 87288921.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12988273) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 360768 + ... + 360803.

It is an arithmetic number, because the mean of its divisors is an integer number (2345109).

Almost surely, 2^12988278 is an apocalyptic number.

12988278 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12988278 is an abundant number, since it is smaller than the sum of its proper divisors (15153030).

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

12988278 is a wasteful number, since it uses less digits than its factorization.

12988278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721579 (or 721576 counting only the distinct ones).

The product of its digits is 129024, while the sum is 45.

The square root of 12988278 is about 3603.9253599374. The cubic root of 12988278 is about 235.0627748397.

The spelling of 12988278 in words is "twelve million, nine hundred eighty-eight thousand, two hundred seventy-eight".