12278898 has 16 divisors (see below), whose sum is σ = 27286560. Its totient is φ = 4092948.

The previous prime is 12278887. The next prime is 12278909. The reversal of 12278898 is 89887221.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12278887) and next prime (12278909).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113640 + ... + 113747.

It is an arithmetic number, because the mean of its divisors is an integer number (1705410).

Almost surely, 2^12278898 is an apocalyptic number.

12278898 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12278898 is an abundant number, since it is smaller than the sum of its proper divisors (15007662).

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

12278898 is a wasteful number, since it uses less digits than its factorization.

12278898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227398 (or 227392 counting only the distinct ones).

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

The square root of 12278898 is about 3504.1258539042. The cubic root of 12278898 is about 230.7029408058.

The spelling of 12278898 in words is "twelve million, two hundred seventy-eight thousand, eight hundred ninety-eight".