12418890 has 32 divisors (see below), whose sum is σ = 32515776. Its totient is φ = 3010560.

The previous prime is 12418883. The next prime is 12418897. The reversal of 12418890 is 9881421.

12418890 = 1574² + 1575² + ... + 1578².

It is an interprime number because it is at equal distance from previous prime (12418883) and next prime (12418897).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12418897) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18487 + ... + 19146.

It is an arithmetic number, because the mean of its divisors is an integer number (1016118).

Almost surely, 2^12418890 is an apocalyptic number.

12418890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12418890 is an abundant number, since it is smaller than the sum of its proper divisors (20096886).

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

12418890 is a wasteful number, since it uses less digits than its factorization.

12418890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37654.

The product of its (nonzero) digits is 4608, while the sum is 33.

The square root of 12418890 is about 3524.0445513642. The cubic root of 12418890 is about 231.5763796565.

The spelling of 12418890 in words is "twelve million, four hundred eighteen thousand, eight hundred ninety".