12478020 has 24 divisors (see below), whose sum is σ = 34938624. Its totient is φ = 3327456.

The previous prime is 12478009. The next prime is 12478031. The reversal of 12478020 is 2087421.

12478020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12478009) and next prime (12478031).

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, 103924 + ... + 104043.

It is an arithmetic number, because the mean of its divisors is an integer number (1455776).

Almost surely, 2^12478020 is an apocalyptic number.

12478020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12478020 is an abundant number, since it is smaller than the sum of its proper divisors (22460604).

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

12478020 is a wasteful number, since it uses less digits than its factorization.

12478020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207979 (or 207977 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 12478020 is about 3532.4240968491. The cubic root of 12478020 is about 231.9433323745.

The spelling of 12478020 in words is "twelve million, four hundred seventy-eight thousand, twenty".