12001880 has 32 divisors (see below), whose sum is σ = 29460240. Its totient is φ = 4364160.

The previous prime is 12001877. The next prime is 12001897. The reversal of 12001880 is 8810021.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13199 + ... + 14078.

Almost surely, 2^12001880 is an apocalyptic number.

12001880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12001880 is an abundant number, since it is smaller than the sum of its proper divisors (17458360).

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

12001880 is a wasteful number, since it uses less digits than its factorization.

12001880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27299 (or 27295 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

The square root of 12001880 is about 3464.3729591370. The cubic root of 12001880 is about 228.9548037907.

The spelling of 12001880 in words is "twelve million, one thousand, eight hundred eighty".